Resolved Caveats—Cisco IOS Release 12.2(7g)
Resolved Caveats—Cisco IOS Release 12.2(7g)
Cisco IOS Release 12.2(7g) is a rebuild release for Cisco IOS Release 12.2(7). The caveats in this
section are resolved in Cisco IOS Release 12.2(7g) but may be open in previous Cisco IOS releases.
•
CSCea02355
Cisco routers and switches running Cisco IOS software and configured to process Internet Protocol
version 4 (IPv4) packets are vulnerable to a Denial of Service (DoS) attack. A rare sequence of
crafted IPv4 packets sent directly to the device may cause the input interface to stop processing
traffic once the input queue is full. No authentication is required to process the inbound packet.
Processing of IPv4 packets is enabled by default. Devices running only IP version 6 (IPv6) are not
affected. A workaround is available.
Cisco has made software available, free of charge, to correct the problem.
This advisory is available at
http://www.cisco.com/warp/public/707/cisco-sa-20030717-blocked.shtml
Resolved Caveats—Cisco IOS Release 12.2(7e)
Cisco IOS Release 12.2(7e) is a rebuild release for Cisco IOS Release 12.2(7). The caveats in this section
are resolved in Cisco IOS Release 12.2(7e) but may be open in previous Cisco IOS releases.
The following information is provided for each caveat:
Symptoms—A description of what is observed when the caveat occurs.
Conditions—The conditions under which the caveat has been known to occur.
Workaround—Solutions, if available, to counteract the caveat.
•
CSCdx14794
Symptoms A modem call does not send data after the data send ready (DSR) signal comes up on the
modem.
Conditions This symptom is observed on a Cisco AS5800 universal access server that has a
Cisco AS5800 series 324-port card that has a Cisco NextPort modem. The client side may keep
sending PPP and Link Control Protocol (LCP) frames until a timeout occurs.
Workaround There is no workaround.
•
CSCdx20135
Symptoms A router may display a “%RADIUS-3-ALLDEADSERVER” error message on the
console.
Conditions This symptom is observed on a Cisco router that is running Cisco IOS Release 12.2 T
even if the radius-server deadtime global configuration command is not configured.
Workaround There is no workaround.
Caveats for Cisco IOS Release 12.2
OL-3513-16 Rev. G0
535
Resolved Caveats—Cisco IOS Release 12.2(7c):
Resolved Caveats—Cisco IOS Release 12.2(7c)
Cisco IOS Release 12.2(7c) is a rebuild release for Cisco IOS Release 12.2(7). The caveats in this section
are resolved in Cisco IOS Release 12.2(7c) but may be open in previous Cisco IOS releases.
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CSCdu58378
A Cisco AS5300 or Cisco AS5800 universal access server that is running tandem Voice over IP
(VoIP) and ISDN traffic may display “%VTSP-3-DSPALARM” and “%VTSP-3-DSP_TIMEOUT”
error messages. The error messages are displayed immediately after the access server is rebooted.
There is no workaround.
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CSCdv40244
A Cisco 7206VXR router that is using an 8-port multichannel T1 port adapter (PA-MC-8T1) and
that is running Cisco IOS Release 12.1(8.04) may experience a continuous stream of
“%POT1E1-3-FWFATAL” error messages:
%POT1E1-3-FWFATAL: Bay 5: firmware needsresetdue to fw watchdog timeout
%POT1E1-3-FWFATAL: Bay 4: firmware needsresetdue to fatal softwareerrors
This condition has also been observed on a Cisco 7206VXR router that is running Cisco IOS
Release 12.1(7.03) or Release 12.0(14)S3. There is no workaround.
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CSCdv45264
Symptoms A universal access server may display the following digital signal processor (DSP) error
message:
%VTSP-3-DSP_TIMEOUT: DSP timeout on event 6: DSP ID=0x1241: DSP error stats
Conditions This symptom is observed on a Cisco AS5300 universal access server that is used as a
voice gateway and that is running Cisco IOS Release 12.2(1a). This symptom has no impact on calls.
Workaround There is no workaround.
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CSCdw01309
Traceback messages may be displayed if an ISDN voice or fax call is made after a dial peer is shut
down by entering the shutdown interface configuration command. This symptom is observed with
ISDN calls that are made on two phones through two Cisco AS5800 universal access servers that are
running the c5800-p4-mz.122-6.4 image of Cisco IOS Release 12.2(6.4). There is no workaround.
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CSCdw41145
When a rotary dial peer is used with the Debit Card 2.0.0 Tool Command Language (TCL), only the
first and the last missed rotary attempts are sent to the RADIUS server. This symptom is observed
on a Cisco AS5300 universal access server that is running Cisco IOS Release 12.2(2)XU03.
This symptom occurs if more than two dial peers are tried in order to reach a destination when the
Debit Card feature is used (with each dial peer set to use different priorities). This symptom occurs
only if the aaa accounting connection h323 start-stop radius global configuration command is
configured. There is no workaround.
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CSCdw52832
A Cisco router boots the boot image in bootflash instead of booting the full Cisco IOS image from
the disk if all of the following conditions are met:
– The configuration register is set to autoboot.
– There is no configuration in NVRAM.
Caveats for Cisco IOS Release 12.2
536
OL-3513-16 Rev. G0
Resolved Caveats—Cisco IOS Release 12.2(7c)
– The boot system command is not in the configuration.
– There is a complete and bootable Cisco IOS image on the disk, and there is a boot image in
bootflash.
Workaround: Set the router to boot the image from the disk using the boot system global
configuration command.
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CSCdw94847
The call success rate (CSR) degrades about 5 percent when a Tool Command Language (TCL) 1.0
Debit Card script is used in a busy network environment. This symptom is observed on a
Cisco AS5800 universal access server that is running Cisco IOS Release 12.2(7a) or
Release 12.2(7b). Calls may be disconnected unexpectedly when this symptom occurs. This
symptom may be caused by a slow response from the RADIUS server when calls are set up and torn
down at the same time.
Workaround: Use a faster RADIUS server.
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CSCdx06621
A router may reload with a bus error while the shortest path first (SPF) is computed. This symptom
is observed if multiple routers are advertising the same prefix in Type-5 or Type-7 link-state
advertisements (LSAs). There is no workaround.
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CSCdx14383
A memory leak may occur when an E1 controller uses E1-R2 signaling. This symptom is observed
on an E1 controller that is installed on a Cisco AS5300 universal access server that is using E1-R2
signaling and that is running Cisco IOS Release 12.2(7). This symptom can be verified by examining
the command output of the show chunk | beg vtsp EXEC command:
1320
1320
32
8 2276
8 713180
0
852
537
537
20
0
0
0
537
537
20
0 VTSP EVENT pool 0x618CC5C8
0 (data) 0x622BCA58
4 Call Management 0x6182D0D0
The value 0 (bold in the output above) indicates the number of voice telephony security parameter
(VTSP) EVENT chunks that are in use. This value should be 0 if no calls are present (as in the case
of the command output that is shown above). This value changes according to the number of active
calls. A continuous increase of this value indicates that VTSP EVENT memory is not being released,
eventually resulting in chunk memory allocation (MALLOC) failures. There is no workaround.
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CSCdx39412
A gateway may use an incorrect cause code value to release calls that are disconnected because of
the expiration of the Real-Time Transport Control Protocol (RTCP) timer. This symptom is observed
on a Cisco AS5300 universal access gateway that has the RTCP timer feature enabled by issuing the
timer receive-rtcp timer gateway configuration command to detect and release idle calls. There is
no workaround.
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CSCdx46031
After a call is stopped, the connection identity (conf-id) value is not displayed in the command
output of the debug voip aaa privileged EXEC command. This symptom is observed if the debug
voip aaa privileged EXEC command is issued while the gw-accounting aaa global configuration
command is enabled.
Workaround: To establish matching start and stop accounting routines, use the call ID in the
following accounting start and stop routines:
start_h323_ccapi_accounting(5)
stop_h323_ccapi_accounting(5)
Caveats for Cisco IOS Release 12.2
OL-3513-16 Rev. G0
537
Resolved Caveats—Cisco IOS Release 12.2(7b):
Resolved Caveats—Cisco IOS Release 12.2(7b)
Cisco IOS Release 12.2(7b) is a rebuild release for Cisco IOS Release 12.2(7). The caveats in this section
are resolved in Cisco IOS Release 12.2(7b) but may be open in previous Cisco IOS releases.
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CSCdv43014
With Systems Network Architectures Switching Services (SNASw), some downstream physical
units (PU) may be stuck in the reset state and cannot be activated. The show snasw pu EXEC
command or show snasw dlus EXEC command may show that the Dependent Logical Unit
Requestor/Dependent Logical Unit Server (DLUR/DLUS) pipe is in the “Pend Inact” state. Data
Link Control (DLC) traces may also show no activity on this pipe.
Workaround: Restart SNASw.
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CSCdv60706
Voice quality issues may occur in a Voice over Frame Relay (VoFR) environment if the G.726r32
codec is used with a 32-ms echo cancellation coverage on the voice port. This configuration works
normally in a Voice over IP (VoIP) environment.
Workaround: Lower the echo cancellation coverage to 16 ms or use another voice codec such as the
G.729r8 or G.711 codec.
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CSCdv81177
When voice calls are present, a Cisco 7200 router will repeatedly display the following message:
%SYS-3-MGDTIMER: Timer has parent, timer link, timer = 623B6970.
-Process= "CC-API_VCM", ipl= 4, pid= 112:
These messages are harmless and do not affect the call completion or voice quality.
There is no workaround.
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CSCdv84788
A Versatile Interface Processor (VIP) may reload or record spurious access after class maps are
configured for Frame Relay. There is no workaround.
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CSCdw16903
On a Cisco router that is running Cisco IOS Release 12.2(7) or an earlier release, when routing
traffic is sent between PRI/ISDN and H.323 Voice over IP (VoIP) network legs, a memory leak may
occur and the router may reload. This condition occurs when the router is handling the passthrough
Q Signaling (QSIG) messages from an ISDN call leg through a VoIP network. The memory leakage
occurs when H.225 connection timeouts are experienced on the VoIP call legs. If this condition is
occurring, a positive value is displayed for the “H.225 establish timeout” statistic when the show
h323 gateway h225 privileged EXEC command is issued. This leak will not occur when normal
voice call traffic is handled.
The number of timeouts can be reduced and the memory leak can be minimized by increasing the
H.323 connection timeout value. The H.323 connection timeout value can be adjusted by issuing the
voice class h323 tag global configuration command. The adjusted value must subsequently be
associated with the voice dial peers. The default value is 15 seconds and can be increased to a
maximum of 30 seconds. There is no workaround.
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CSCdw18697
A Cisco 7200 or 7500 router may pause indefinitely when Network Based Application Recognition
(NBAR) is enabled.
Workaround: Use the ip nbar resources max-age initial-links expand-links global configuration
command.
Caveats for Cisco IOS Release 12.2
538
OL-3513-16 Rev. G0
Resolved Caveats—Cisco IOS Release 12.2(7b)
For example, if the ip nbar resources 600 initial-links 50 global configuration command is issued,
the system will wait for 600 seconds (10 minutes) before it tries to clean up a flow.
Note: Use the maximum amount for the initial-links argument to specify the number of
pre-allocation links that the resource manager should pre-allocate at initialization time according to
what the system will allow.
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CSCdw38373
On a Cisco 2600 router that has a 2-port serial low-speed asynchronous and synchronous WAN
interface card (WIC 2 A/S) that is configured for binary synchronous communication (BISYNC) on
port 0 and has the physical-layer async interface configuration command configured on port 1, the
clear to send (CTS) signal on port 0 is inverted for a short period of time when BISYNC polling is
started after the router is reloaded. This behavior causes an ATM machine to enter the error recovery
mode and may prevent the ATM machine from recovering and reestablishing proper communication
with the router.
The configuration of the physical-layer async interface configuration command on port 1
overwrites the hardware configuration on port 0 that controls the CTS signals for port 0 and may
interfere with previous CTS hardware configuration on ports that have been previously configured.
This behavior affects the 2-port serial WAN interface card (WIC-2T).
Workaround: After the ports have been initialized through a reload or after the physical-layer async
interface configuration command is removed from the configuration of a port, issue the shutdown
interface configuration command followed by the no shutdown interface configuration command
on the serial interface to reinitialize the hardware settings.
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CSCdw39876
A Cisco router that is connected to a Cisco Catalyst 5500 switch may reload with a bus error or enter
a constant boot loop. The output from the reload indicates that 802.1q (dot1q) is the cause of this
behavior even though the router is not configured for dot1q trunking. The looping stops after the
Ethernet cable is physically disconnected from the switch. This behavior was observed on Cisco IOS
Release 12.2(6.7).
Workaround: Configure a native VLAN on the trunk and configure all the protocol attributes on the
native VLAN instead of the main interface. The two configurations are equivalent. The advantage
of configuring the VLAN as native is that all packets are received and sent as untagged.
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CSCdw48170
On a Cisco 3810 router that is running Cisco IOS Release 12.1(13) or Release 12.2(6.8), it may not
be possible to configure the clock rate interface configuration command. There is no workaround.
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CSCdw51050
A Cisco router that is using Inter-Switch Link (ISL) encapsulation may experience spurious memory
accesses and reload because of a bus error while a tagged packet is process-switched.
Workaround: Use 802.1Q encapsulation. This workaround may require changes for 802.1Q
encapsulation on the sides of the Ethernet switch and the router because both sides of the LAN
should use the same type of encapsulation.
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CSCdw54869
A Cisco router may reload with a bus error at an invalid memory location after the no ip nbar
resources global configuration command is removed. This behavior occurs if the following
conditions exist:
– Network-Based Application Recognition (NBAR) is disabled. Class map, policy map, and
service policy statements that are used for NBAR are removed from the configuration.
Caveats for Cisco IOS Release 12.2
OL-3513-16 Rev. G0
539
Resolved Caveats—Cisco IOS Release 12.2(7b):
– The configuration contains the ip nbar resources max-age initial-links expand-links global
configuration command.
Workaround: Remove the no ip nbar resources global configuration command before disabling
NBAR.
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CSCdw56572
If the configured burst size of low latency queueing (LLQ) is changed in a policy map that is
attached to an interface and if the configured bandwidth of LLQ is not changed, priority queueing
(PQ) will stop dropping packets even though traffic that is sent through the PQ is greater than the
configured bandwidth while there is congestion. If the traffic that is going through PQ is much
greater than the configured bandwidth, the minimum bandwidth guarantees of the classes are not
met.
Workaround: Remove and reattach the service policy.
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CSCdw58159
A Cisco AS5300 universal access server responds with a “Release complete” message with a cause
code of 0xD1 (invalid call reference value) when a 4 Electronic Switching System (4ESS) sends a
setup message followed by a facility message. There is no workaround.
•
CSCdw58272
After a Cisco AS5800 universal access server has been running for more than 10 hours under stress
conditions, modem ISDN Channel Aggregation (MICA) technologies modems may be marked as
bad. There is no workaround.
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CSCdw74143
On a Cisco router, the Route Switch Processor (RSP) reloads when a policy map is associated to a
Frame Relay map class. This condition was observed on a router that had 380 interfaces in which
each interface had distributed Frame Relay fragmentation (dFRF.12) configured. There is no
workaround.
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CSCdw51935
When serial interfaces that use Frame Relay are configured, the following message may be
displayed:
%RSP-3-BADBUFHDR: freeing MEMD pak, address 0 -Traceback= 603A0098 603A7D98 603AD718
603B35F0 6035CA0C
%RSP-3-BADBUFHDR: freeing MEMD pak, address 0 -Traceback= 603A0098 603A7D98 603AD718
603B35F0 6035CA0C
This message is displayed after Frame Relay-fragmented packets that are selected for selective
packet discarding are reassembled. If the message is displayed repeatedly, the router has to be
reloaded to return to normal working condition. There is no workaround.
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CSCdw57901
ISDN service profile identifier 1 (SPID 1) and ISDN SPID 2 cannot be configured on a Cisco 1700,
2600, or 3600 router that uses the 2-port ISDN BRI voice interface card, S/T interface, network
termination or network terminal equipment (VIC-2BRI-NT/TE) or the 2-port ISDN BRI voice
interface card, S/T interface and terminal equipment (VIC-2BRI-S/T-TE). ISDN SPID 1 and ISDN
SPID 2 cannot be configured on the BRI voice module (BVM) on a Cisco MC3810 multiaccess
concentrator. There is no workaround.
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CSCdw86740
When a service policy is applied to a large number of interfaces simultaneously, the service policy
may overrun the interprocess communications (IPC) mechanism on a Cisco 7500 router.
Caveats for Cisco IOS Release 12.2
540
OL-3513-16 Rev. G0
Resolved Caveats—Cisco IOS Release 12.2(7a)
Workaround: Break up the service policy and apply the service policy individually to a smaller
group of interfaces.
Resolved Caveats—Cisco IOS Release 12.2(7a)
Cisco IOS Release 12.2(7a) is a rebuild of Cisco IOS Release 12.2(7). All caveats listed in this section
are resolved in Cisco IOS Release 12.2(7a) but may be open in previous Cisco IOS releases.
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CSCdw29595
The performance of the encryption path degrades when Cisco IOS Release 12.2(6.8) is used with a
hardware encryption card. The loss in performance occurs because encrypted packets are
process-switched instead of being fast-switched. This condition occurs when IP Security (IPSec) is
applied to the interfaces while the hardware encryption card is used. There is no workaround.
•
CSCdw65903
An error can occur with management protocol processing. Please use the following URL for further
information:
http://www.cisco.com/cgi-bin/bugtool/onebug.pl?bugid=CSCdw65903
Resolved Caveats—Cisco IOS Release 12.2(7)
This section describes possibly unexpected behavior by Cisco IOS Release 12.2(7). All the caveats listed
in this section are resolved in Cisco IOS Release 12.2(7). This section describes severity 1 and 2 caveats
and select severity 3 caveats.
Access Server
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CSCdv08170
Symptoms “DS-RS flow control has got out of sync” messages may be displayed when analog calls
are cleared by entering the clear spe EXEC command.
Conditions This symptom is observed on a Cisco AS5800 universal access server and may impact
service traffic on the Cisco AS5800.
Workaround There is no workaround.
•
CSCdv21963
Symptoms Negative acknowledgments (NAKs) from Modem ISDN channel aggregation (MICA)
modems may be observed when analog calls disconnect.
Conditions This symptom is observed on a Cisco AS5300.
Workaround There is no workaround.
Caveats for Cisco IOS Release 12.2
OL-3513-16 Rev. G0
541
Resolved Caveats—Cisco IOS Release 12.2(7):
Basic System Services
•
CSCdu53252
Symptoms A ROM monitor (ROMmon) alarm is triggered if the rising threshold equals or exceeds
7001. Because the ROMmon probe is scheduled to sample every second, and the maximum physical
bandwidth is 56 kbps (700 ifOutOctets per second), it should not be possible for ifOutOctets to be
more than or equal to 7000 within a time difference of one second.
rmon alarm 1 ifEntry.16.2 1 delta rising-threshold 7001 1 falling-threshold 0
Conditions This symptom is observed on the serial interface of a Cisco 2600 series.
Workaround There is no workaround.
•
CSCdu71329
Symptoms A Cisco router that is using a compression service adapter (SA-COMP/4) may use
software compression instead of hardware compression when the show compress EXEC command
is entered.
Conditions This symptom is observed on a Cisco router that has a SA-COMP/4 compression service
adapter.
Workaround There is no workaround.
•
CSCdv03625
Symptoms A Cisco router that has a Route Switch Processor (RSP 8) does not respond or responds
incorrectly to Simple Network Management Protocol (SNMP) requests for the
“ciscoFlashPartitionTable” table and the “ciscoFlashFileTable” table with normal Personal
Computer Memory Card International Association (PCMCIA) flashcards.
Conditions This symptom is observed on a Cisco router that has an RSP 8 and that is running
Cisco IOS Release 12.2(2)T or Release 12.2(2)T1.
Workaround There is no workaround.
•
CSCdv40395
Symptoms A router may reload unexpectedly because of a bus error at a low address.
Conditions This symptom is observed on an ISDN BRI interface of a Cisco 7200 series router while
stack compression is enabled and if Cisco IOS Release 12.2(3), Release 12.2(3.6), or
Release 12.2(5) is used.
Workaround Disable compression on the ISDN BRI interface to prevent the router from reloading
because of this bus error.
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CSCdv47081
Symptoms A loss of synchronization between the compression peers and a Cisco router may occur,
and the router may not complete the Frame Relay Implementation Agreement (FRF.9) negotiation.
Conditions This symptom is observed when the router that has a serial interface and that is
configured with Data Compression over FRF.9 compression.
Workaround Enter the shutdown interface configuration command followed by the no shutdown
interface configuration command simultaneously on both sides of the serial interface. When the
Cisco IOS software is upgraded to correct this condition, both compression peers have to be
upgraded. If only one compression peer is upgraded, negotiation may continue to fail.
•
CSCdv51254
Symptoms A Cisco Versatile Interface Processor (VIP) may reload at the vip_fib_fs process when
the VIP is sending traffic.
Caveats for Cisco IOS Release 12.2
542
OL-3513-16 Rev. G0
Resolved Caveats—Cisco IOS Release 12.2(7)
Conditions This symptom is observed on a Cisco VIP.
Workaround There is no workaround.
•
CSCdv51645
Symptoms A Cisco 5300 accepts voice calls, sends access-request messages to RADIUS servers and
receives access-accept messages from RADIUS servers, but the Cisco AS5300 terminates the call
regardless of the response from the RADIUS server because of an authorization failure.
Conditions This symptom is observed when the Cisco 5300 is upgraded from Cisco IOS
Release 12.1(3a)X17 to Cisco IOS Release 12.2(5).
Workaround There is no workaround.
•
CSCdv56243
Symptoms When virtual routing and forwarding (VRF) is used on a Cisco 6400 broadband
aggregator, the node route processor (NRP) may not receive the RADIUS Stop Record Attribute 49
(Acct-Terminate-Cause) when a connection terminates.
Conditions This symptom is observed on a Cisco 6400 broadband aggregator that has an NRP.
Workaround There is no workaround.
•
CSCdv60768
Symptoms Cisco IOS software will reload if the target address for Response Time Reporter (RTR)
Domain Name System (DNS) probes is longer than 92 bytes,
Conditions This symptom is observed on a Cisco router.
Workaround Avoid looking up host names that are longer than 92 bytes.
•
CSCdv63230
Symptoms The if-needed keyword of the aaa authentication ppp default if-needed global
configuration command may not function normally.
Conditions This symptom is observed on a Cisco AS5400.
Workaround There is no workaround.
•
CSCdv78855
Symptoms Public buffer pools on a Cisco router are not incremented dynamically when
free=min free=0.
Conditions This symptom is observed on a Cisco router that is running Cisco IOS Release 12.2(5).
Workaround To set the min-free buffers, enter the buffers verybig min-free number global
configuration command.
•
CSCdv89415
Symptoms The rtr reaction-configuration command can be used to trigger another probe when a
timeout, a threshold violation, or a verify error event occurs. However, the probe that should be
triggered is activated only once during the first occurrence of the reaction condition. If the reaction
condition occurs again (for example, when the timeout condition clears) and if the triggered probe
is in the pending state, the probe should be activated again.
Conditions This symptom is observed on a Cisco 2600 series that is running Cisco IOS
Release 12.2(3).
Workaround There is no workaround.
Caveats for Cisco IOS Release 12.2
OL-3513-16 Rev. G0
543
Resolved Caveats—Cisco IOS Release 12.2(7):
•
CSCdw01189
Symptoms A queueing-related spurious access traceback may be observed with non-IP packets
when class-based weighted fair queueing (CBWFQ) is used.
Conditions This symptom is observed on a Cisco 7200 series.
Workaround There is no workaround.
•
CSCdw01726
Symptoms A Simple Network Management Protocol version 3 (SNMPv3) user configuration is
changed when a router is reloaded.
Conditions This symptom is observed when an SNMPv3 user is created using message digest 5
(MD5) authentication by entering the following commands:
Router# snmp group groupy v3 auth
Router# snmp user abcdefghij groupy v3 auth md5 abcdefghij
Then, the engine ID is then changed by entering the following command:
snmp-server engineID local 00000009020000024B0008FE
An SNMP walk is performed by entering the following command, the configuration is saved, and
the router is reloaded.
Router(config)# snmpwalk -v 3 -u abcdefghij -A abcdefghij -a MD5 -l AuthNoPriv
device-name
The SNMP walk is successful and the following debug header output is displayed when the debug
snmp EXEC command is entered:
Incoming SNMP packet : v3 packet security model: v3 security level: auth username:
abcdefghij
The router is reloaded and a second SNMP walk is performed by entering the following command:
Router# snmpwalk -v 3 -u abcdefghij -A abcdefghij -a MD5 -l AuthNoPriv device-name
After the second SNMP walk is performed, the command does not generate any output and the
following debug header output is displayed when the debug snmp EXEC command is entered:
Incoming SNMP packet : v3 packet security model: v3 security level: noauth : username:
abcdefghij
Workaround Do not change the default engine identity (ID).
•
CSCdw30178
A Cisco router that is running Cisco IOS Release 12.0(20.3)S1 may not be accessible through the
Ethernet 0 interface.
Workaround: Load the software onto the router, copy the running configuration file to the startup
configuration, and reload the router.
IBM Connectivity
•
CSCdv16277
Symptoms A router that is running Cisco IOS Release 12.1(10.1) or a later release with data-link
switching (DLSw) and Ethernet Redundancy (ER) may reload.
Conditions This symptom is observed on a Cisco router that is running Cisco IOS
Release 12.1(10.1).
Workaround There is no workaround.
Caveats for Cisco IOS Release 12.2
544
OL-3513-16 Rev. G0
Resolved Caveats—Cisco IOS Release 12.2(7)
•
CSCdv51603
Symptoms A Cisco router may reload because of a segmentation violation (SegV).
Conditions This symptom is observed on a Cisco 1720 that is running Cisco IOS Release 12.2(2)T1
or Release 12.2(5) with the data-link switching plus (DLSw+) Ethernet Redundancy feature
enabled.
Workaround Remove the DLSw+ Ethernet Redundancy feature, and configure data-link switching
(DLSW) with transparent bridging on the Ethernet segment of the router.
•
CSCdv55198
Symptoms In a network of Cisco 7200 routers that use the Network Processing Engine (NPE-225),
source-route bridging (SRB) frames are dropped under light load conditions when data-link
switching (DLSw) or TCP is used to connect SRB to the FDDI on the mainframe. DLSw circuits are
disconnected if there is a high load.
Conditions This symptom is observed in a network of Cisco 7200 routers that use the network
processing engine (NPE-225).
Workaround Use the NPE-200 instead of the NPE-225 network processing engine.
Interfaces and Bridging
•
CSCdk27330
Symptoms A Versatile Interface Processor (VIP) may reload if the following command sequence is
entered on the controller of a Channelized T3 Interface Processor (CT3IP):
t1 external 3 linecode b8zs cablelength 100
no t1 3 timeslots 1-24
no t1 3 clock source line
All commands that are entered after the no t1 3 timeslots 1- 24 command may cause the VIP to
reload.
Conditions This symptom is observed on a Route Switch Processor (RSP-2)
Workaround To prevent the controller from reloading, enter the commands in either one of the
following sequences:
no t1 3 clock source line
t1 external 3 linecode b8zs cablelength 100
no t1 3 timeslots 1-24
or
no t1 3 clock source line
no t1 3 timeslots 1-24
t1 external 3 linecode b8zs cablelength 100
Be certain to enter the no t1 3 timeslots 1-24 command after the no t1 3 clock source line command.
•
CSCds00250
Symptoms The ifTable/ifXTabe is not populated for interfaces that have defined trunks that use
802.1Q encapsulation.
Caveats for Cisco IOS Release 12.2
OL-3513-16 Rev. G0
545
Resolved Caveats—Cisco IOS Release 12.2(7):
Conditions This symptom is observed on a Cisco router that has trunks that use 802.1Q
encapsulation. CSCds00250 adds ifXTable support for 802.1Q and Inter-Switch Link (ISL)
interfaces.
Workaround There is no workaround.
•
CSCds44777
Symptoms The data terminal ready (DTR) port adapter on a Cisco router does not continuously drop
and pulse according to the time intervals configured with the pulse-time seconds interface
configuration command. On the 4-port serial port adapter (PA-4T+) and Fast Serial Interface
Processor (FSIP), the “RSP-3-RESTART” message may appear right before a Cisco router has to be
restarted to recover a serial interface from a circuit outage that was configured by entering the
pulse-time seconds interface configuration command
Conditions This symptom is observed on a Cisco 7500 series router that a PA-4T+ port adapter, an
8-port serial port adapter (PA-8T), and an FSIP.
Workaround There is no workaround.
•
CSCdu71723
Symptoms The following traceback messages may be displayed on a router:
%ALIGN-3-SPURIOUS Spurious memory access made at 0x603DE76C reading 0x78
%ALIGN-3-TRACE -Traceback= 603DE76C 6058CA04 6058C6D8 6058BF2C 607CAC8C 607CE4A0
607C03F4 607C94DC
Conditions This symptom is observed when an Simple Network Management Protocol (SNMP)
walk query is performed on a Cisco router that is running Cisco IOS Release 12.1(6).
Workaround There is no workaround.
•
CSCdv11017
Symptoms An output stuck condition may be observed on a Cisco router.
Conditions This symptom is observed on a Cisco 7513 router that has a serial port adapter and that
is running Cisco IOS Release 12.1(9).
Workaround There is no workaround.
•
CSCdv14065
Symptoms Frame Relay, packet-by-packet compression, and access violation traceback messages
that involve the “pbp_compress” or the “pbp_uncompress” address may be observed. The “BRI1:1:
COMPRESS: invoked on bad context” or the “BRI1:1: DECOMP invoked on bad context” message
may also be displayed.
Conditions This symptom is observed on a Cisco router that is running Cisco IOS Release 12.2.
Workaround Disable payload compression.
•
CSCdv37998
Symptoms Interfaces that are created on a channelized T3 (CT3) single wide port adapter on a
Versatile Interface Processor (VIP) may flap.
Conditions This symptom is observed on a Cisco 7500 series router that is running Cisco IOS
Release 12.0(16)S1 and that has a CT3 wide port adapter on a VIP.
Workaround Reload the VIP.
•
CSCdv51548
Symptoms A multichannel T3 port adapter (PA-MC-2T3+) that is operating in the clear-channel
mode does not send an alarm indication signal (AIS) after the PA-MC-2T3+ is administratively shut
down.
Caveats for Cisco IOS Release 12.2
546
OL-3513-16 Rev. G0
Resolved Caveats—Cisco IOS Release 12.2(7)
Conditions This symptom is observed on a Cisco router that has a PA-MC-2T3+.
Workaround There is no workaround.
•
CSCdv57768
Symptoms The process that manages reset requests from hardware compression assist may not run,
and asynchronous compression reset requests for Compression Control Protocol (CCP) PPP may not
be processed.
Conditions This symptom is observed after the variable holding ID for the process that manages
reset requests from hardware compression assist is initialized.
Workaround There is no workaround.
•
CSCdv63695
Symptoms The ip mtu bytes interface configuration command may be missing from a Token Ring
interface after the interface is reloaded.
Conditions This symptom is observed on a Cisco 7500 series that is running Cisco IOS
Release 12.1(9).
Workaround There is no workaround.
•
CSCdv72634
Symptoms The following debug messages may be displayed on a Cisco AS5800 universal access
server and the performance of the Cisco AS5800 may be affected:
DEC21140:FastEthernet0/1/0: Test traffic
FastEthernet0/1/0: No VLANs configured on this hwidb
Conditions This symptom is observed on a Cisco AS5800.
Workaround There is no workaround.
•
CSCdv74384
Symptoms A Token Ring interface may not recover after a switch that it is connected to is
power-cycled.
Conditions This symptom is observed when a dedicated Token Ring port adapter (PA-4R-DTR) is
used with a Versatile Interface Processor (VIP-2) on a Cisco 7500 series router. The Token Ring
interface that is configured for full-duplex and 16 MB does not recover if the Cisco Catalyst 3920
switch that is configured with a full-duplex port (FDX-port) (to which the PA-4R-DTR interface is
connected) is power-cycled.
Workaround If the Cisco Catalyst 3920 switch port is configured for AUTO and not FDX-port, the
PA-4R-DTR interface will recover in the half-duplex mode after the shutdown interface
configuration command followed by the no shutdown interface configuration command is entered
on the interface.
•
CSCdv77513
Symptoms A Versatile Interface Processor (VIP2-50 or VIP4-50) may reload.
Conditions This symptom is observed on a Cisco 7500 series router that has a channelized T3 (CT3)
single wide port adapter on a VIP2-50 or VIP4-50.
Workaround There is no workaround.
•
CSCdv90590
Symptoms Integrated routing and bridging (IRB) may not work as expected on a Cisco router.
Conditions This symptom is observed on a Cisco 7200 series router that has a Token Ring port
adapter (PA-DTR).
Caveats for Cisco IOS Release 12.2
OL-3513-16 Rev. G0
547
Resolved Caveats—Cisco IOS Release 12.2(7):
Workaround There is no workaround.
•
CSCdv90801
Symptoms Packets are not marked with the Differentiated Services Code Point (DSCP) value that is
specified in the policy map that is configured on an 802.1q subinterface when matching is done on
the source IP address.
Conditions This symptom is observed on a Cisco 2600 series.
Workaround There is no workaround.
•
CSCdw00126
Symptoms Issues may be observed with Bridge-Group Virtual Interfaces (BVIs). The input queue
may become wedged and the router may stop passing traffic when this symptom occurs.
Conditions This symptom is observed on a Cisco router that is running Cisco IOS Release 12.2(6.4)
while bridging is configured.
Workaround There is no workaround.
•
CSCdw06815
Symptoms Packets may not be forwarded if the virtual connection (VC) number is the same on both
input and output ATM interfaces that are on the same bridge group.
Conditions This symptom is observed on a Cisco 7200 series.
Workaround Configure different VC numbers on the input and output interfaces.
•
CSCdw39876
A Cisco router that is connected to a Cisco Catalyst 5500 switch may reload with a bus error or enter
a constant boot loop. The output from the reload indicates that 802.1q (dot1q) is the cause of this
behavior even though the router is not configured for dot1q trunking. The looping stops after the
Ethernet cable is physically disconnected from the switch. This behavior was observed on Cisco IOS
Release 12.2(6.7).
Workaround: Configure a native VLAN on the trunk and configure all the protocol attributes on the
native VLAN instead of the main interface. The two configurations are equivalent. The advantage
of configuring the VLAN as native is that all packets are received and sent as untagged.
IP Routing Protocols
•
CSCds66047
Symptoms A Cisco router that has a Versatile Interface Processor (VIP) may reload if the show ip
rsvp installed detail EXEC command is entered while a Resource-Reservation Protocol (RSVP)
session is installed on an interface that is configured to support Distributed Weighted Fair Queuing
(DWFQ).
Conditions This symptom is observed on a Cisco 7500 series that has a VIP.
Workaround There is no workaround.
•
CSCds89720
Symptoms Packets are dropped because a Cisco Express Forwarding (CEF) entry or a cache entry
for a route that is not complete can be silently dropped without any indication of the drop in the
output of the show interface EXEC command. This symptom occurs because the default minimum
and maximum default queue size of the selective packet discard (SPD) feature is 73 and 74, and the
default input queue size is 75.
Caveats for Cisco IOS Release 12.2
548
OL-3513-16 Rev. G0
Resolved Caveats—Cisco IOS Release 12.2(7)
Conditions This symptom is observed on a Cisco router that is running Cisco IOS Release 12.0(8)
or Release 12.1(4).
Workaround There is no workaround.
•
CSCdu08686
Symptoms A router may generate router link states but may fail to generate network link states for
a connected network. The Open Shortest Path First (OSPF) neighbors may come up correctly on all
the routers in the network.
Conditions This symptom is observed on a Cisco 7206VXR router that is running the OSPF Protocol
and acting as a designated router (DR).
Workaround Set the priority on the interface to 0 so that the router is not the DR for that link.
•
CSCdu88697
Symptoms A memory leak may occur while a Lightweight Directory Access Protocol (LDAP)
packet is processed on a router that is running Network Address Translation (NAT).
Conditions This symptom is observed while an LDAP packet is processed on a Cisco router that is
running Cisco IOS Release 12.2(3)
Workaround There is no workaround.
•
CSCdu89525
Symptoms A Cisco router may reload when an Enhanced Interior Gateway Routing Protocol
(EIGRP) router is removed by entering the no router eigrp command.
Conditions This symptom is observed when an EIGRP router is removed entering the no router
eigrp command.
Workaround There is no workaround.
•
CSCdv06458
Symptoms A Catalyst 3550 switch may reload if the show ip eigrp neighbors EXEC command is
entered repeatedly while Enhanced Interior Gateway Routing Protocol (EIGRP) adjacencies are
coming up.
Conditions This symptom is observed under rare circumstances on a Catalyst 3550 switch. The
show ip eigrp neighbors EXEC command has to be entered at just the right time for this condition
to occur.
Workaround There is no workaround.
•
CSCdv10306
Symptoms When a static route is configured through an interface and the interface is subsequently
shut down, the static route is still shown as valid.
Conditions This symptom is observed only if all of the following conditions are met:
– A static route is configured via a gateway.
– A static Address Resolution Protocol (ARP) of the gateway is configured.
– Cisco Express Forwarding (CEF) is enabled.
– An interface that shares the same subnet address as the gateway address is shut down.
Workaround Clear the static route by entering the clear ip route destination gateway privileged
EXEC command.
Caveats for Cisco IOS Release 12.2
OL-3513-16 Rev. G0
549
Resolved Caveats—Cisco IOS Release 12.2(7):
•
CSCdv35791
Symptoms A Border Gateway Protocol (BGP) route reflector is not advertising locally-sourced
Multicast Border Gateway Protocol (MBGP) routes correctly.
Conditions This symptom is observed on a Cisco 12000 series.
Workaround Enter the clear ip bgp * EXEC command on the route reflector.
Alternate Workaround Remove the route map and enter the clear ip bgp * EXEC command, replace
the route map, and enter the clear ip bgp * EXEC command again.
The suggested workarounds are effective until the periodic BGP scanner process is run. The BGP
scanner process will invalidate the routes again.
•
CSCdv40492
Symptoms A Network Address Translation (NAT) port allocation failure may occur on a Catalyst
switch.
Conditions This symptom is observed after a sustained period of operation on a Catalyst 6000
switch that has a Multilayer Switch Feature Card (MSFC) and that is running Cisco IOS
Release 12.1(7a)E3.
Workaround To clear the translation table and allow NAT to function normally, reload the MSFC.
•
CSCdv47188
Symptoms If the first entry in the Multicast Border Gateway Protocol (MBGP) routing table is the
supernet of the destination IP address, or if the MBGP route exists but does not have the best path,
Reverse Path Forwarding (RPF) lookup will fail or will return a unicast Border Gateway Protocol
(BGP) route if a unicast BGP route exists.
Conditions This symptom is observed on a Cisco 12000 series.
Workaround Remove the first entry, or add a dummy route that is smaller than the first entry. In the
case of a MBGP route without a best path, change the network configuration to ensure that the
specified destination address has the best path.
•
CSCdv56698
Symptoms Multicast traffic stops after the shutdown interface configuration command is entered
followed by the no shutdown command interface configuration command on a Packet over SONET
(PoS) interface. This condition may occur when any link-up or link-down event takes place.
Conditions This symptom is observed on a Catalyst 6000 series.
Workaround To clear this condition, enter the clear ip mroute * EXEC command on the PoS
interface.
•
CSCdv71515
The bidirectional flag is not reset on a multicast route (mroute) entry when the group status changes
from the bidirectional state to the dense state. There is no workaround.
•
CSCdv85419
Symptoms Two Multilayer Switch Feature Cards (MSFCs) may enter the “stuck-in-active” state
while the two MSFCs are waiting for a neighboring MSFC to reply to an Enhanced Interior Gateway
Routing Protocol (EIGRP) query.
Conditions This symptom is observed under rare circumstances on two MSFCs. This symptom
occurs when the MSFCs first receives a query that has a bad metric before receiving a second query
that has an infinite metric. This condition clears after the two MSFC cards wait through the 3-minute
Stuck in Active (SIA) route timer.
Caveats for Cisco IOS Release 12.2
550
OL-3513-16 Rev. G0
Resolved Caveats—Cisco IOS Release 12.2(7)
Workaround There is no workaround.
•
CSCdv89039
A Cisco router that is running Cisco IOS Release 12.2(5) may reload because of a bus error at the
ipnat_unlock_parent_entry process. There is no workaround.
•
CSCdw09196
Symptoms An output interface is cut off when a virtual interface goes up or down.
Conditions This symptom is observed after the shutdown interface configuration command
followed by the no shutdown interface configuration command is entered on the virtual interface.
This symptom is reflected in the output of the show up mroute EXEC command. When this
symptom occurs, no packets other than Real-Time Transport Control Protocol (RTCP) packets are
detected on the voice port.
Workaround There is no workaround.
•
CSCdw10106
Symptoms A router may reload when the clear ip nat trans * EXEC command is entered after a
large number of translations are created.
Conditions This symptom is observed on a Cisco 7200 series.
Workaround There is no workaround.
•
CSCdw11274
Symptoms A router that receives a gratuitous Address Resolution Protocol (ARP) for a static ARP
entry with an alias keyword reloads because of a bus error.
Conditions Further conditions under which these symptoms occur are not known at this time.
Workaround Do not use an alias keyword on a static ARP entry. An alias keyword allows the router
to answer ARP requests for the static ARP entry, but in many cases, an alias keyword is not required
because the router must have the static ARP entry only for its own use.
•
CSCdw11897
Symptoms When network address translation (NAT) is used, a new FTP session may pause
indefinitely if the response from the server is dropped after the response is translated by the router.
The FTP session must be restarted from the client. As long as the passive response that is returned
from the server is not dropped between the router and the client, the FTP session will operate
normally.
Conditions This symptom is observed with FTP sessions on a Cisco router.
Workaround There is no workaround.
•
CSCdw12678
Symptoms When a DR/DF change occurs on interfaces that have static or virtual group membership,
the interfaces are not added to the mroute state.
Conditions This symptom is observed on a Cisco router that is running Cisco IOS Release 12.2.
Workaround There is no workaround.
•
CSCdw17989
Symptoms After CSCdt87405 is implemented, inconsistent and unpredictable behavior may be
observed when Protocol Independent Multicast dense mode (PIM-DM) is used on certain
point-to-point interfaces.
Conditions This symptom is likely to be observed with tunnel interfaces.
Caveats for Cisco IOS Release 12.2
OL-3513-16 Rev. G0
551
Resolved Caveats—Cisco IOS Release 12.2(7):
Workaround There is no workaround.
ISO CLNS
•
CSCdv72514
Symptoms When partition avoidance is configured on two border routers in the Level 1 (intra-area)
area and if one of the border routers loses all Level 1 adjacency and loses End
System-to-Intermediate System (ES-IS) adjacency with the Level 1 router, the router that has lost
all Level 1 and ES-IS adjacency reports that the Level 1 router is unreachable instead of forwarding
packets (that are destined to the Level 1 router) through an alternate path to another border router
that still has Level 1 adjacency with the Level 1 router.
Conditions The condition described in this caveat occurs in a redundant Connectionless Network
Service (CLNS) multiarea network that consists of one Level 1 (intra-area) router that has
adjacencies with two border routers, each of which is running in multiple areas. A Level 2
(inter-area) adjacency exists between the two border routers.
Workaround There is no workaround.
•
CSCdw31942
When a Cisco 12000 series line card is reloaded with microcode, the Intermediate
System-to-Intermediate System (IS-IS) interface configuration may be lost.
Workaround: Manually reconfigure the interface configuration.
Miscellaneous
•
CSCdm00113
Symptoms When an ATM-CES-OC3 port adapter card is removed and reinserted, all running
configuration parameters are retained, except the parameters in the atm max-channels number
interface configuration command.
Conditions This symptom is observed on an ATM-CES-OC3 port adapter card.
Workaround There is no workaround.
•
CSCds28731
Symptoms When a member link is shut down in a distributed Multilink PPP (dMLP) bundle, the
Multilink interface may flap. The following sample syslog output is displayed when this condition
occurs:
%SYS-5-CONFIG_I: Configured from console by console
%LINK-5-CHANGED: Interface Serial0/0/0:0, changed state to administratively down
%LINK-3-UPDOWN: Interface Multilink1, changed state to down
%LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/0/0:0, changed state to down
%LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/0/1:0, changed state to down
%LINEPROTO-5-UPDOWN: Line protocol on Interface Multilink1, changed state to down
%LINK-3-UPDOWN: Interface Multilink1, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/0/1:0, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface Multilink1, changed state to up
Conditions This symptom is observed when a member link is shut down in a dMLP bundle on a
Route Switch Processor (RSP-4).
Workaround There is no workaround.
Caveats for Cisco IOS Release 12.2
552
OL-3513-16 Rev. G0
Resolved Caveats—Cisco IOS Release 12.2(7)
•
CSCds44967
Symptoms The following traceback messages are displayed continuously on a Network Switch
Processor (NSP) console:
00:04:15:
00:04:16:
00:04:16:
00:04:16:
00:04:16:
-Traceback= 603832CC 603D4360 603CC864 600C11E4 600C11D0
ASSERTION FAILED: file "../src-4k-nsp/nsp_pam_sunipdh_hw.c", line 884
-Traceback= 603832CC 603D4360 603CC864 600C11E4 600C11D0
ASSERTION FAILED: file "../src-4k-nsp/nsp_pam_sunipdh_hw.c", line 884
-Traceback= 603832CC 603D4360 603CC864 600C11E4 600C11D0*
Conditions This symptom is observed on a Cisco 6400 universal access concentrator.
Workaround There is no workaround.
•
CSCds69145
Symptoms A router may reload after a process is suspended while it is deleting a label virtual circuit
(LVC) and a second process deletes the same LVC while the first process is suspended. After the
first process is suspended, the first process completes the deletion of the now non-existent LVC and
causes the router reload.
Conditions This symptom affects platforms that are running Cisco IOS Release 12.0 ST, 12.2, and
Release 12.2 T.
Workaround There is no workaround.
•
CSCds82662
Symptoms On a Cisco 7200 series I/O controller card that has a Fast Ethernet (FE) interface (RJ-45)
that is configured with Protocol Independent Multicast (PIM) and full duplex, the line protocol flaps
when the cable is removed or if the cable fails instead of entering the line protocol down state.
Conditions This symptom is observed on a Cisco 7200 series I/O controller card that has an RJ-45
FE interface that is configured with PIM and full duplex.
Workaround Remove either PIM or full duplex from the interface.
•
CSCds82883
Symptoms Border Gateway Protocol (BGP) aggregate routes on a provider edge (PE) router appear
in the Virtual Private Network (VPN) routing/forwarding (VRF) and the Cisco Express Forwarding
(CEF) table, but the routes do not appear in the tag forwarding table. This symptom prevents access
to all networks that are covered by this aggregate address from other PE and customer edge (CE)
routers on the same VPN.
Conditions This symptom is observed on a Cisco router that is used as a PE router and that is running
Cisco IOS Release 12.2.
Workaround Define a VRF loopback interface with an IP address that aggregates all the IP addresses
that are to be aggregated by entering the aggregate-address router configuration command.
•
CSCdt10624
Symptoms A Cisco router may reload unexpectedly if all Multiprotocol Label Switching (MPLS)
Traffic Engineering (TE) tunnels are removed. This situation occurs under heavy load conditions
(for example, when several thousand routes and several hundred TE tunnels are removed).
Conditions This symptom is observed on a Cisco 12000 series router.
Workaround There is no workaround.
•
CSCdt45274
Symptoms A Cisco AS5300 universal access server may reload with a bus error when attempts are
made to clear Media Gateway Control Protocol (MGCP) connections that are tied to an
announcement trunk on the Cisco AS5300 by shutting down the T1 controller.
Caveats for Cisco IOS Release 12.2
OL-3513-16 Rev. G0
553
Resolved Caveats—Cisco IOS Release 12.2(7):
Conditions This symptom is observed on a Cisco AS5300 that is running Cisco IOS
Release 12.2(0.5).
Workaround There is no workaround.
•
CSCdt68781
The show call resources voice EXEC command is not available on a Cisco 7200 series router. There
is no workaround.
•
CSCdt88425
Symptoms A Cisco 7500 series router that is functioning as a Multiprotocol Label Switching
(MPLS) virtual private network (VPN) provider edge (PE) router may drop VPN traffic when there
are multiple links going into the provider network, and the links have configurations that force
packets to be punted to the Route Switch Processor (RSP). An example of such a configuration
occurs when the router is configured for RSP-based weighted fair queueing (WFQ).
To check if packets need to be punted to the RSP, enter the show ip cef network [mask
[longer-prefix] [detail] EXEC command on the Versatile Interface Processor (VIP). The command
output will show the punt adjacency for a given entry.
To check if RSP-based WFQ is enabled, check the output of the show interface EXEC command.
Conditions This symptom is observed on a Cisco 7500 series router that is functioning as an MPLS
VPN PE router.
Workaround If this condition occurs because RSP-based WFQ is enabled, perform any of the
following:
– Enable distributed weighted fair queueing (DWFQ).
– Enable FIFO queueing.
– If the condition is not related to queueing, disable load sharing.
•
CSCdu00328
Symptoms A Cisco 7500 series router may stop receiving packets on certain interfaces when a
Cisco 6500 series switch that is connected through a port channel is reloaded.
Conditions This symptom is observed on a Cisco 7500 router that is connected to a Cisco 6500 series
switch through the port channel. This symptom does not occur if the port channel is removed.
Workaround Run normal IP between the Cisco 7500 series router and the Cisco 6500 series switch
without the port channel configuration.
•
CSCdu20618
Symptoms One side of a circuit emulation service (CES) E1 port of a Cisco LightStream LS1010
switch connection may remain consistently in the YELLOW alarm or ALARM INTEGRATION
state.
Conditions This symptom is observed on one side of a CES E1 port of a Cisco LightStream LS1010
switch connection.
Workaround There is no workaround.
•
CSCdu39550
Symptoms If a ds0-group is removed from a T1 controller on a multiple digital signal level 0 (ds0)
group controller, all of the custom channel-associated signaling (CAS) configurations for the
remaining ds0-groups are removed, even if the corresponding ds0-groups are still configured.
Caveats for Cisco IOS Release 12.2
554
OL-3513-16 Rev. G0
Resolved Caveats—Cisco IOS Release 12.2(7)
Conditions This symptom is observed on a Cisco 3600 series that has ds0-groups configured on the
gateway controller and that is running Cisco IOS Release 12.2(6).
Workaround Do not configure multiple ds0-groups and use only one ds0-group for each controller.
•
CSCdu39773
Symptoms A cable access router may run out of memory and reload. This symptom is caused by
memory leaks that occur after event logging is enabled.
Conditions This symptom is observed on a Cisco uBR900 series cable access router about six hours
after a failed Data-over-Cable Service Interface Specifications (DOCSIS) configuration image
upgrade attempt.
Workaround There is no workaround.
•
CSCdu46679
Symptoms An output queue may become wedged after a few minutes. The following command
output is displayed when the show interface fast 0/1 EXEC command is entered:
FastEthernet0/1 is up, line protocol is up Hardware is a vendor-specific chip Queueing
strategy: fifo Output queue 40/40, 66826 drops; input queue 0/75, 0 drops
Conditions This symptom is observed on a Fast Ethernet or Gigabit Ethernet interface that has a
vendor-specific chip and that is running Cisco IOS Release 12.2(1).
Workaround There is no workaround.
•
CSCdu48008
Symptoms The creation of two new processes and a 27 KB memory allocation may cause an
interface to reset. The total amount of free memory decreases by 2000 bytes with each reset.
Conditions This symptom is observed on a Cisco uBR900 series cable access router.
Workaround There is no workaround.
•
CSCdu54460
Symptoms A software-forced reload may occur on a Cisco router because of a memory corruption.
Conditions This symptom is observed on a Cisco router that is running Cisco IOS Release 12.2(2.1).
This symptom occurs when the router is configured as a Systems Network Architecture (SNA)
switch.
Workaround There is no workaround.
•
CSCdu55250
Symptoms Platforms that have fast CPUs may intermittently fail to boot if a Cisco IOS image is
loaded from a 48-MB or a 128-MB Advanced Technology Attachment (ATA)-disk card. An
“ATA_Status time out waiting for x” message (where “x” is a digit) is displayed when this symptom
occurs. The platform will also return to the ROM monitor (ROMmon) mode. This condition can
occur when a platform is booted from a 48-MB or a 128-MB ATA disk Personal Computer Memory
Card International Association (PCMCIA) card. Linear Flash PCMCIA cards and cards of different
capacities do not exhibit this condition.
Conditions This symptom is observed only when a router is booting from 48-MB or 128-MB
ATA-disk PCMCIA cards. Linear Flash PCMCIA and cards of other capacities have not exhibited
this symptom.
This symptom appears to be caused by random and intermittent internal noise on the ATA-disk card
that causes it to occasionally respond slowly to a read request when an image is loaded. The
symptom is more apparent on platforms that have fast CPUs because the time that the system waits
for the ATA-disk card to return the data is less than the time on slower platforms.
Caveats for Cisco IOS Release 12.2
OL-3513-16 Rev. G0
555
Resolved Caveats—Cisco IOS Release 12.2(7):
Workaround Boot the router by using another device.
Alternate Workaround Use a different ATA-disk card or a linear Flash PCMCIA card, or use a boot
helper image to load the desired image from the ATA-disk card.
•
CSCdu62738
Symptoms The firmware for a 2-Port RJ-48 Multiflex Trunk E1 with Drop and Insert
(VWIC-2MFT-E1-DI) interface card does not update the internal configurations properly when the
ds0-group controller configuration command is configured on the controller. This behavior may
cause subsequent PRI calls to fail.
Conditions This symptom is observed on a Cisco 2600 series.
Workaround Power-cycle the router.
•
CSCdu64572
Symptoms The dot1dTpFdbTable MIB contains the transparent bridge table. If the MIB is traversed
by a getnext request, every instance of every object in the table is returned. If a getone request is
used to retrieve a particular instance of one of the dot1dTpFdbStatus elements, the error
NO_SUCH_INSTANCE_EXCEPTION is returned.
Conditions This symptom is observed on a Cisco uBR900 series router.
Workaround There is no workaround.
•
CSCdu65439
Symptoms Extended Border Nodes (EBNs) that support Global Virtual Routing Nodes (GVRNs)
will not calculate cross-subnet routes through a Systems Network Architecture (SNA) switch unless
the SNA switch is also updated to support the GVRN enhancement to the Advanced Peer-to-Peer
Networking (APPN) architecture and High Performance Routing (HPR) architecture. This update
includes setting the GVRN indicator in the appropriate control vector and making sure that the costs
are 0 for Transmission groups (TGs) to GVRNs.
Conditions This symptom is observed on a Cisco router that is running Cisco IOS Release 12.2.
Workaround There is no workaround.
•
CSCdu67066
Symptoms The Layer 2 (L2) status on a multichannel DS1/PRI port adapter (PA-MC-4T1) may be
unexpectedly changed to TEL_ASSIGNED. This symptom cannot be corrected by entering the
shutdown interface configuration command followed by the no shutdown interface configuration
command.
Conditions This symptom is observed on a PA-MC-4T1 port adapter on a Cisco router.
Workaround Reload the router.
•
CSCdu73631
Symptoms A Cisco router may experience a memory leak when both Generic Routing Encapsulation
(GRE) and IP Security (IPSec) are configured.
Conditions This symptom is observed on a Cisco 7200 series router.
Workaround There is no workaround.
•
CSCdv00231
Symptoms A router may reload and display traceback messages if the crypto card is shut down while
Internet Key Exchange (IKE) negotiation is in progress.
Conditions This symptom is observed on a network in which two unit under test (UUT) crypto peer
routers, UUT 1 and UUT 2, are separated by a forwarding router.
Caveats for Cisco IOS Release 12.2
556
OL-3513-16 Rev. G0
Resolved Caveats—Cisco IOS Release 12.2(7)
Workaround There is no workaround.
•
CSCdv03920
Symptom In a Signaling System 7 (SS7) Interconnect for Voice Gateway solution, calls can be
rejected with “Cause i = 0x8095 (Call rejected)” cause code. The call success rate may decline until
all calls are rejected because of a depletion of internal software resources.
Conditions This symptom can be identified with the debug error message when the debug voice
rawmsg detail EXEC command is entered:
CDAPI: cdapi_create_msg(): FOR_RAW_MSGS queue is empty
Workaround The router must be reloaded.
•
CSCdv04500
Symptoms In a Cisco Signaling System 7 (SS7) Interconnect for Voice Gateways Solution, if a
time-division multiplexing (TDM) hairpinned call egresses the network access server on an ISDN
or an NI2/Redundant Link Manager (RLM) interface and if there was no calling number present in
the call setup, the NAS will use the destination pattern match of the best matching dial peer as the
calling number. This behavior will result in either the calling number being incorrect if the pattern
that is used is a valid number or the call may fail if the destination pattern contains wildcard
characters.
Conditions This symptom is observed on a Cisco AS5400 in a Cisco SS7 Interconnect for Voice
Gateways Solution.
Workaround Configure a dial peer by entering the dial-peer voice number pots global
configuration command. To prevent the NAS from using a destination pattern as the calling number.
No calling number will be sent in the setup on the outgoing call leg.
•
CSCdv08117
Symptoms When the 240-byte option is configured in the codec payload bytes selection under a
Voice over IP (VoIP) dial peer, the Foreign Exchange Service (FXS) port pauses indefinitely after
the call. The router has to be reloaded after this symptom occurs.
Conditions This symptom is observed on a Cisco 3600 series.
Workaround There is no workaround.
•
CSCdv10743
Symptoms A Protocol Independent Multicast-sparse mode (PIM-SM) shared tree is not pruned in
full at the Protocol Independent Multicast-Rendezvous Point (PIM-RP) during a shortest path tree
(SPT) switchover.
Conditions This symptom is observed on a Catalyst 6000 Multilayer Switch Feature Card (MSFC).
Workaround There is no workaround.
•
CSCdv17524
Symptoms A Cisco AS5800 universal access server may generate Modem ISDN channel
aggregation status acknowledgement (MICA NAK) error messages, such as the following in the
logging buffer:
%MICA-3-NAK: NAK from modem 13 in state 0 -- payload 0x29
This message may indicate that modem Ring No Answer (RNA) will increase.
Conditions This symptom is observed on a Cisco AS5800 that is running Cisco IOS Release 12.2.
Workaround There is no workaround.
Caveats for Cisco IOS Release 12.2
OL-3513-16 Rev. G0
557
Resolved Caveats—Cisco IOS Release 12.2(7):
•
CSCdv18135
Symptoms A digital signal processor timeout may occur after 40 minutes of testing with voice, fax,
and Dual Tone Multifrequency (DTMF) digits on a Cisco AS5300 universal access server.
Conditions This symptom is observed on a Cisco AS5300 when different voice codecs were used on
different voice channels, and when Voice Active Detection (VAD) is enabled. Echo cancellation was
enabled and set to 32 ms, and DTMF relay was enabled. About 1150 calls were made when the first
DSP timeout occurred.
Workaround There is no workaround.
•
CSCdv18731
Symptoms A software-forced reload may be observed on a router after a memory leak occurs.
Conditions This symptom is observed on a Cisco 2650 router that has a High Density Voice Network
Module (NM-HDV) card that is configured as a Multilink PPP (MLP) WAN interface while data and
voice packets are going through the interface.
Workaround Use Frame Relay encapsulation.
•
CSCdv18939
Symptoms Some objects in ifXEntry, such as ifHCInOctets and ifHCOutOctets, return a null value
for objects while ifInOctets and ifOutOctets objects return correct values.
Conditions This symptom is observed on a Cisco 6400 Network Switch Processor (NSP).
Workaround There is no workaround.
•
CSCdv21880
Symptoms A Cisco 6400 Node Switch Processor (NSP) cannot establish a lock on a priority 2 or a
priority 3 Building Integrated Timing Supply (BITS) clock when the priority 1 BITS clock source
fails.
Conditions This symptom is observed on a Cisco 6400 NSP.
Workaround There is no workaround.
•
CSCdv22431
Symptoms Class-based marking does not work on ATM inverse multiplexing over ATM (IMA)
interfaces that are in the Cisco Express Forwarding (CEF) switching path.
Conditions This symptom is observed on the IMA interfaces of a Cisco router.
Workaround There is no workaround.
•
CSCdv25447
Symptoms When a personal computer is connected to a Cisco AS5300 access server on Telnet port
25 is using the Simple Mail Transfer Protocol (SMTP), an error message is displayed when the
personal computer attempts to send an attached Tag Image File Format (TIFF) file to a fax machine.
This error message is displayed, even though the quality of the fax transmission is acceptable. The
delivery system will attempt to send the fax again and may cause multiple deliveries of the same fax.
Conditions This symptom is observed on a Cisco AS5300.
Workaround There is no workaround.
•
CSCdv25973
Symptoms A Cisco AS5800 may reload because of an unexpected exception at “CPU signal 10, PC
= 0x60C07CA8.”
Caveats for Cisco IOS Release 12.2
558
OL-3513-16 Rev. G0
Resolved Caveats—Cisco IOS Release 12.2(7)
Conditions This symptom is observed on a Cisco AS5800.
Workaround There is no workaround.
•
CSCdv28249
Symptoms All digital signal processors (DSPs) on the module of a Cisco router may go down and
the following error message may be displayed:
%VTSP-3-DSP_TIMEOUT: DSP timeout on event 6: DSP ID=0x4: D) Sep 4 16:11:56:
DSP_TIMEOUT -- DSP error stats: 6, 1
Conditions This symptom is observed on a Cisco 3660 that is running Cisco IOS Release 12.2(1b).
Workaround There is no workaround.
•
CSCdv28401
Symptoms A T.38 fax relay call may fail. The fax call goes through, but it is disconnected
abnormally.
Conditions This symptom is observed when T.38 fax relay is configured on a connection trunk.
Workaround There is no workaround.
•
CSCdv33270
Symptoms Resources may be associated with a virtual private dialup network (VPDN) group, even
when there are no active calls.
Conditions This symptom is observed on a Cisco router that is running Cisco IOS
Release 12.1(10)AA.
Workaround There is no workaround.
•
CSCdv34189
Symptoms PPP for all analog calls may fail if the clear spe EXEC command is entered repeatedly.
The NextPort digital signal processor (DSP) will train up successfully, but the Link Control Protocol
(LCP) will not open.
Conditions This symptom is observed only when a Service Processing Element (SPE) has active
calls on one of its ports while the clear spe EXEC command is entered.
Workaround Clear active calls on the SPE by entering the clear interface async x/y EXEC
command before entering the clear spe EXEC command.
•
CSCdv35003
Symptoms A dial connection from a Cisco 800 router to a Cisco 3640 router may fail after a few
days of operation. A reload of the Cisco 3640 router may allow the connection to be restored
temporarily, but the connection may fail again.
Conditions This symptom is observed on a Cisco 800 and a Cisco 3640 router.
Workaround There is no workaround.
•
CSCdv38171
Symptoms An 8-port serial port adapter (PA-8T) interface may flap under a heavy load if the PA-8T
is configured to receive a clock rate of more than 2015232 bps and when all the serial ports of an
MX serial application-specific integrated circuit (ASIC) (MUESLIX) controller (either 0 through 3
or 4 through 7) are in use.
Conditions This symptom is observed on a Cisco PA-8T port adapter interface.
Workaround Configure clock rates that are less than or equal to 2015232 bps at the provider end.
Caveats for Cisco IOS Release 12.2
OL-3513-16 Rev. G0
559
Resolved Caveats—Cisco IOS Release 12.2(7):
•
CSCdv38896
Symptoms When a single-port Fast Ethernet 100BASE-FX (PA-FE-FX) port adapter is used on a
Versatile Interface Processor (VIP) for a Cisco 7500 series, an online insertion and removal (OIR)
changes the configuration of the Fast Ethernet interface from “duplex auto” to “spped auto.”
Conditions This symptom is observed on a Cisco VIP for a Cisco 7500 series that is running
Cisco IOS Release 12.2(3).
Workaround There is no workaround.
•
CSCdv39727
Symptoms A universal gateway may reload when it runs a debit card application while it is under a
heavy load.
Conditions This symptom is observed on a Cisco AS5400.
Workaround Enable call admission control to reject the call if the CPU usage is more than
92 percent.
•
CSCdv40918
Symptoms When the tag-switching ip global configuration command is disabled globally, the Tag
Distribution Protocol (TDP) or a Label Distribution Protocol (LDP) will not be torn on a
label-controlled ATM (LC-ATM) interface, even if the interface is not being used by any other
application. The Tag Forwarding Information Base (TFIB) is properly maintained in spite of this
condition. This symptom does not occur if non-ATM interfaces are used.
Conditions This symptom is observed on a Cisco 7200 series.
Workaround There is no workaround.
•
CSCdv41817
Symptoms A user may experience difficulty loading a Toolkit Command Language (TCL) script
onto a Cisco router by using FTP. There is no observed packet loss on the network when this
symptom occurs.
Conditions This symptom is observed on a Cisco 3600 series router that is running Cisco IOS
Release 12.2(3). The FTP server uses a vendor-specific application.
Workaround There is no workaround.
•
CSCdv43113
Symptoms A Cisco voice gateway 200 may reload with a segmentation violation (SegV) exception
after the voice parameters echo-cancel coverage and output attenuation are changed.
Conditions This symptom is observed on a Cisco VG200.
Workaround There is no workaround.
•
CSCdv43373
Symptoms A Gigabit Ethernet interface on a Cisco 7500 router may experience interprocess
communication (IPC) memory buffer problems after the output becomes stuck and may display the
following message:
%RSP-3-RESTART: interface GigabitEthernet0/0/0, not transmitting Output Stuck on
GigabitEthernet0/0/0
Conditions This symptom is observed on the Gigabit Ethernet interface of a Cisco 7500 series.
Workaround Avoid using autonegotiation.
Caveats for Cisco IOS Release 12.2
560
OL-3513-16 Rev. G0
Resolved Caveats—Cisco IOS Release 12.2(7)
•
CSCdv44651
Symptoms An IP Security (IPSec) packet is not sent to a BRI after a security association (SA) is
successfully established. This symptom continues to occur, even when the packets are
process-switched or after the multilink is disabled.
Conditions This symptom is observed on a Cisco 1700 series that is running Cisco IOS
Release 12.2(3).
Workaround Either disable the dialer-map statements and enable the dialer-string statements under
the BRI interface or add another dialer-map statement for the crypto peer.
•
CSCdv44860
Symptoms A “set” that is configured on a main interface service policy has no effect on the
subinterface traffic. Packets that are switched out of a subinterface are classified correctly by the
policy, but the set counter is not incremented.
Conditions This symptom is observed on the main interface of a Cisco router.
Workaround Apply the policy map to the subinterface.
•
CSCdv45394
Symptoms When a PPP over Ethernet (PPPoE) client attempts to establish a TCP (HTTP)
connection to some websites, debugs from Cable Modem Termination System (CMTS) indicate
responses that have acknowledge (ACK) and synchronize (SYN) flags that are sent to the virtual
access interface and IP PPP encapsulation (Network Control Program [NCP] type 0x21) is
displayed. The protocol analyzer on the Ethernet segment reports that “no response” IP packets are
originating from the CMTS.
Conditions This symptom is observed on a Cisco uBR7200 series that is running Cisco IOS
Release 12.2(3).
Workaround There is no workaround.
•
CSCdv45416
Symptoms Multilink PPP (MLP) may fail if the fragments are smaller than 1000 bytes in size.
Conditions This symptom is observed on a Cisco 2600 series that is running Cisco IOS
Release 12.2(5).
Workaround There is no workaround.
•
CSCdv45674
Symptoms Spurious memory access may be observed on a Cisco uBR900 series cable access router
when the Cisco uBR900 boots up.
Conditions This symptom is observed on a Cisco uBR900.
Workaround There is no workaround.
•
CSCdv45745
Symptoms Excessive output drops may occur on a serial port adapter (such as a DS3, High-Speed
Serial Interface [HSSI], or E1) on a Cisco 7200 series or a Cisco 7400 series router that has a
Network Service Engine-1 (NSE-1) when Parallel Express Forwarding (PXF) is enabled.
Conditions This symptom is observed on the serial port adapter of a Cisco 7200 series or Cisco 7400
series router that has an NSE-1.
Workaround Disable PXF.
Caveats for Cisco IOS Release 12.2
OL-3513-16 Rev. G0
561
Resolved Caveats—Cisco IOS Release 12.2(7):
•
CSCdv45770
Symptoms After running for a certain period of time, hairpinned calls and normal voice calls may
begin to be dropped on Cisco voice gateways. Over time, software resources will be lost and no new
calls will be accepted.
Conditions This symptom is observed if the idsn bchan-negotiate resend-setup command is
configured on a Cisco IOS release that contains the fix for CSCdv30465.
Workaround Do not enable the idsn bchan-negotiate resend-setup command.
•
CSCdv46312
Symptoms A switch may reload when the no tag-switching ip interface configuration command is
configured on an interface that has the tag-switching ip interface configuration command enabled
on its subinterfaces.
Conditions This symptom is observed on a Catalyst 6000 switch that has a Multilayer Switch
Feature Card (MSFC).
Workaround There is no workaround.
•
CSCdv46469
Symptoms A logon window may fail intermittently when fast connections are attempted by changing
source IP addresses, changing source ports, or when a fixed source IP address is used by changing
source ports that use authentication proxy authentication.
Conditions This symptom is observed on a Cisco 2500 series.
Workaround There is no workaround.
•
CSCdv46826
Symptoms When an erroneous piggyback message is received from a call agent that has two
connection identities (IDs) (such as when the connection IDs are bound together with an embedded
event), a reload will occur. The specific message is as follows:
200 5 OK . DLCX 47845 aaln/0 MGCP 1.0 NCS 1.0 C: 11123 I: 2 I: 2 X: 1234111111 R:
hd(A, E(R(hu(N), hf(N), [0-9*#T](D)), S(dl(to=0))))
Conditions This symptom is observed on a Cisco uBR900.
Workaround Do not send an erroneous piggyback message.
•
CSCdv46863
Symptoms Packets are not marked correctly with the intended differentiated services code point
(DSCP) when the ip multicast routing global configuration command is enabled.
Conditions This symptom is observed on a Cisco 7200 series.
Workaround There is no workaround.
•
CSCdv47546
A Cisco AS5300 universal access gateway that is running Cisco IOS Release 12.2(1a) and that is
used as a Voice over IP (VoIP) gateway may experience a gradual memory leak. There is no
workaround.
•
CSCdv47664
Symptoms The online insertion and removal (OIR) of a Versatile Interface Processor (VIP) in a
Cisco 7500 series router may cause Cisco Express Forwarding (CEF) to become disabled on VIP
cards in other slots.
Conditions This symptom is observed on a Cisco 7500 series.
Workaround Enter the microcode reload global configuration command after a failed OIR.
Caveats for Cisco IOS Release 12.2
562
OL-3513-16 Rev. G0
Resolved Caveats—Cisco IOS Release 12.2(7)
•
CSCdv48301
Symptoms A call that is made with a debit card application on the plain old telephone service
(POTS) side is disconnected after being established. The call is later reconnected on the receiving
end when the number is entered from the calling phone according to the prompt instructions. After
the call is established for the second time, the user on the phone that is called cannot hear anything
from the user on the calling phone.
Conditions This symptom is observed on a Cisco AS5300 series and a Cisco AS5800 universal
access server.
Workaround There is no workaround.
•
CSCdv49142
Symptoms The R2 trunk of a Cisco 3600 series router that is connected to a public switched
telephone network (PSTN) line may stop accepting calls and return a busy signal if the call load
exceeds 45 incoming calls.
Conditions This symptom is observed on a Cisco 3600 series.
Workaround There is no workaround.
•
CSCdv49923
Symptoms Inverse Address Resolution Protocol (ARP) does not work when a permanent virtual
circuit (PVC) bundle is tested on an ATM.
Conditions This symptom is observed on a Cisco router.
Workaround There is no workaround.
•
CSCdv50040
Symptoms This caveat corrects a defect that causes a failure when objects are set in the
docsDevEvent group by using a data-over-cable service interface specification (DOCSIS)
configuration file.
Conditions This symptom affects a Cisco uBR900 series.
Workaround There is no workaround.
•
CSCdv50045
Symptoms If there is more than one filter specified through the Multimedia Cable Network
System (MCNS) configuration file by using the create-and-go status, the last filter is not set.
Conditions This symptom is observed on a Cisco uBR900 series cable access router and affects only
Cisco cable access router platforms. This symptom is observed if multiple filters are set at once by
using the command line tool to select the status as “create-and-go”. This symptom is introduced by
CSCdu39778.
Workaround There is no workaround.
•
CSCdv50046
Symptoms A Cisco Catalyst 6500 switch that is running Cisco IOS Release 6.3(1) with two
Supervisor Engine 2 (WS-X6K-SUP2-2GE) with a Multilayer Switch Feature Card 2
(WS-F6K-MSFC2) and that has a FlexWAN module (WS-X6182-2PA) with an enhanced ATM OC3
multimode port adapter that is running Cisco IOS Release 12.1(7a)E1 may experience a buffer leak
on the MSFC2 and display the following message:
Small buffers, 104 bytes (total 36773, permanent 50, peak 88803 @ 1w5d): 25 in free
list (20 min, 150 max allowed) 95159588 hits, 286991 misses, 316049 trims, 352772
created 17027 failures (0 no memory)
Caveats for Cisco IOS Release 12.2
OL-3513-16 Rev. G0
563
Resolved Caveats—Cisco IOS Release 12.2(7):
The sscop_sendSdPdu process is not releasing the memory buffers and causes memory allocation
(malloc) errors, which cause interprocess communication (IPC) issues that may subsequently cause
the FlexWAN module to be disabled and the following error message to be displayed:
%SYS-2-MALLOCFAIL: Memory allocation of 276 bytes failed from 0x40210A74, pool I/O,
alignment 32
Conditions This symptom is observed only if the Catalyst 6509 is started up without any
configuration, or if the Cisco Catalyst 6509 has just been configured with a new configuration.
Workaround Start the Catalyst 6509 after the configuration is saved to NVRAM and when further
changes are made to the configuration.
•
CSCdv50143
Symptoms An access server may reload after it is enabled by entering the debug tdm dynamic
EXEC command is enabled.
Conditions This symptom is observed when digital signal processor (DSP)-less time-division
multiplexing (TDM) is performed.
Workaround Do not enable TDM dynamic debugging.
•
CSCdv50283
Symptoms A 2-port serial WAN interface card on a Cisco 3640 router that is connected to external
encryption equipment may lose the capability to resynchronize with the external encryption
equipment because the pulse-time seconds interface configuration command may stop functioning
when both serial interfaces are enabled on the line card. The pulse-time seconds interface
configuration command works normally when only one interface is used on the card.
Conditions This symptom is observed on a 2-port WAN interface card on a Cisco 3640 router that
is running Cisco IOS Release 12.2(3).
Workaround There is no workaround.
•
CSCdv51463
Symptoms A Cisco router may experience issues with the Address Resolution Protocol (ARP) when
Cisco Express Forwarding (CEF) is enabled.
Conditions This symptom is observed on a Cisco 2600 router that is running Cisco IOS
Release 12.1(10).
Workaround Disable CEF.
•
CSCdv52116
Symptoms The atmInterfaceMaxVccs MIB value does not match the number of maximum active
virtual circuits (VCs) that are seen in the output of the show interface EXEC command.
Conditions This symptom is observed on a Cisco router that is running Cisco IOS Release 12.2(4)T.
Workaround There is no workaround.
•
CSCdv52628
Symptoms On a Cisco AS5300 universal access server that is running Cisco IOS Release 12.2(2)XA
with VCware 9.08, most of the digital signal processor (DSP) resources in the access server are in
the “Inuse” state after the access server has been running for a while. This behavior causes calls to
be disconnected with “resource unavailable” stated as the reason.
A secondary effect of this symptom relates to another problem on the Cisco AS5300. The customer
has three dial peers with same destination pattern (00T) but a different priority. Two of the dial peers
that have a higher priority are Voice over IP (VoIP) dial peers, and the third is a plain old telephone
service (POTS) dial peer.
Caveats for Cisco IOS Release 12.2
564
OL-3513-16 Rev. G0
Resolved Caveats—Cisco IOS Release 12.2(7)
The Cisco AS5300 may fail to match the highest priority dial peer and is matching two of the dial
peers, twice. When the Cisco AS5300 finally selects the third dial peer because there are no
resources for the other two, it is too late because the call has already been disconnected.
Conditions This symptom is observed on a Cisco AS5300 that is running Cisco IOS software and
VCware 9.08.
Workaround Reload the Cisco AS5300 to free up the DSP resources.
•
CSCdv52629
Symptoms A Cisco AS5300 universal access gateway may reload.
Conditions This symptom is observed on a Cisco AS5300 when an embedded notification request
(E) action is specified in the Requested Events (R:) parameter of a Media Gateway Control Protocol
(MGCP) Notification Request (RQNT).
Workaround Send a separate RQNT request.
•
CSCdv53218
Symptoms Modems are marked as “BAD” after analog calls are cleared on a Cisco AS5800
universal access server by entering the clear spe EXEC command.
Conditions This symptom is observed on a Cisco AS5800.
Workaround There is no workaround.
•
CSCdv53233
The console of a Cisco AS5800 router shelf may display several “No active radius servers found”
messages followed by “Radius server is responding again” (previously dead) messages when the
server is working normally and authenticating users. This condition does not impact service.
Workaround: Remove the radius-server deadtime minutes global configuration command from the
router.
•
CSCdv54518
Symptoms Fast switching does not work on a Cisco uBR7200 universal broadband router for PPP
over Ethernet (PPPoE) sessions on a cable interface.
Conditions This symptom is observed on a Cisco uBR7200 series.
Workaround Enable Cisco Express Forwarding (CEF) on the incoming (backhaul) interface or
disable fast switching on the outgoing cable interface.
•
CSCdv54898
Symptoms Abnormal and premature disconnects and a low call success rate may be observed on a
Cisco AS5800.
Conditions This symptom is observed on a Cisco AS5800 that is running a continuity test (COT).
There are no modem cards installed on the system when this symptom occurs.
Workaround Disable COT, or add a modem card to the Cisco AS5800.
•
CSCdv55001
Symptoms Data that is received on a modem connection may be corrupted when AT commands are
entered or when an EXEC session is initiated.
Conditions This symptom is observed on a Cisco AS5800 or a Cisco AS5850.
Workaround There is no workaround.
Caveats for Cisco IOS Release 12.2
OL-3513-16 Rev. G0
565
Resolved Caveats—Cisco IOS Release 12.2(7):
•
CSCdv55003
Symptoms A Cisco 7206 router that has a Network Processing Engine (NPE-150) and that is running
Cisco IOS Release 12.2(5) may reload unexpectedly because of a bus error. This symptom is
indicated in the command output of the show version EXEC command:
System returned to ROM by bus error at PC 0x60665188, address 0xDEADC207
Conditions This symptom is likely to occur if the following features are configured:
– IP Real-Time Protocol (RTP) with header compression
– Queueing service policy (configured on the multilink interface)
– Weighted Random Early Detection (WRED) (configured in the quality of service (QoS) service
policy)
Workaround Do not configure the features described above.
•
CSCdv56165
Symptoms A Cisco AS5800 universal access server router shelf may reload unexpectedly when
system processing engines (SPEs) that are already marked as BAD are cleared by entering the clear
spe [slot | slot/spe] EXEC command. The service of the router shelf may be impacted when this
symptom occurs.
Conditions This symptom is observed on a Cisco AS5800.
Workaround There is no workaround.
•
CSCdv56330
Symptoms The carrier-delay [seconds] interface configuration command should prevent an
interface from being declared as down before the carrier delay timer expires. This expected behavior
does not always occur.
Conditions This symptom is observed on a Cisco router.
Workaround To maintain the routes in the routing table, use a static route to null0, and set an
administrative distance that is higher than the administrative distance that is used by routing
protocols, such as the Routing Information Protocol (RIP) or the Enhanced Interior Gateway
Protocol (EIGRP) by entering the ip route 10.10.1.1 255.255.2550 null0 250 global configuration
command.
•
CSCdv56410
Symptoms A Cisco router may reload because of a memory leak.
Conditions This symptom is observed when a plain old telephone service (POTS) dial-peer rotary is
configured and when the terminating switch sends a disconnect with a progress indicator (PI).
Workaround On routers that are running Cisco IOS Release 12.2(1) or a later release, configure the
voice call convert-discpi-to-prog global configuration command. This command will convert an
inbound ISDN disconnect message with a PI to an H.225 progress message that has the same PI
value.
•
CSCdv56652
Symptoms Calls do not go through when R2 semi compelled signaling is configured.
Conditions This symptom is observed on a Cisco AS5300.
Workaround There is no workaround.
•
CSCdv57549
Symptoms The Fast Ethernet interface of a Node Route Processor (NRP-1) enters the RESET state
after the NRP-1 is booted.
Caveats for Cisco IOS Release 12.2
566
OL-3513-16 Rev. G0
Resolved Caveats—Cisco IOS Release 12.2(7)
Conditions This symptom is observed when the other interface that is connected to the Fast Ethernet
interface is in the down state. If the connected interface is in the up state, the Fast Ethernet interface
of the NRP-1 does not enter the RESET state and works as expected.
Workaround The Fast Ethernet interface comes out of the RESET state if both of the connected
interfaces on the NRP and the neighbor are flapped a few times.
•
CSCdv58382
Symptoms A cable access router may not be able to handle a Data-over-Cable Service Interface
Specifications (DOCSIS) configuration file that has a large number of Simple Network Management
Protocol (SNMP) objects (more than 256).
Conditions This symptom is observed on a Cisco uBR900 series cable access router.
Workaround There is no workaround.
•
CSCdv58739
Symptoms The transmitter-delay microseconds interface configuration command is not supported
on a serial WAN interface card.
Conditions This symptom is observed on the 1-port serial WAN interface card (WIC-1T) and the
2-port asynchronous and synchronous WAN interface card (WIC-2A/S).
Workaround There is no workaround.
•
CSCdv59947
Symptoms The following warning message may be displayed on the console of a router:
% Command "tag-switching tag-range ..." obsolete; use "mpls label range...". %
This message is informational and does not cause affect the operation of the router.
Conditions This symptom is observed on the Catalyst 6000 Multilayer Switch Feature Card
(MSFCs) of a Cisco router.
Workaround There is no workaround.
•
CSCdv60041
Symptoms A router may reload because of a bus error that points to a valid address that belongs to
the main memory. However, this symptom continues to occur after the memory is replaced. When
this symptom occurs, the output of the show log EXEC command indicates that the Program
Counter (PC) is corrupted:
%ALIGN-1-FATAL: Corrupted program counter pc=0x618CDE04, ra=0x0, sp=0x61E81520
Conditions This symptom is observed on a Cisco 7140.
Workaround Use a Cisco 7500 series router or another platform as a temporary workaround.
•
CSCdv60200
Symptoms Calls that are received on a Q-Signaling (QSIG) interface are released with a user busy
signal if there are no available digital signal processor (DSP) resources. The isdn disconnect-cause
interface configuration command is not a viable workaround because it overrides all causes and the
user busy signal.
Conditions This symptom is observed on a Cisco router that is running Cisco IOS Release 12.2(1a).
Workaround There is no workaround.
Caveats for Cisco IOS Release 12.2
OL-3513-16 Rev. G0
567
Resolved Caveats—Cisco IOS Release 12.2(7):
•
CSCdv60987
Symptoms A router may reload when the show flash all EXEC command is entered. Since
Cisco IOS Release 12.2(2), the show flash all EXEC command has become part of the show tech
EXEC command. This condition is noticeable only on low-end systems that support multiple
banksizes for internal Flash.
Conditions This symptom is observed on a Cisco router that is running Cisco IOS Release 12.2(1).
Workaround Replace multiple banksize Flash with uniform banksize Flash.
•
CSCdv61300
Symptoms A Cisco gatekeeper normally adds the destinationInfo parameter to the location
confirmation (LCF) message that it returns in response to an location request (LRQ). This
functionality was added to Cisco IOS Release 12.1(5)XM and later releases. This functionality
ensures that if the dialed number identification Service (DNIS) was translated by a Gatekeeper
Transaction Message Protocol (GKTMP) application residing over a gatekeeper, the newly
translated digits will reach back to the originating gatekeeper.
However, it may not be possible to ensure that the terminating gatekeeper (TGK) is using a
Cisco IOS release or is a third-party gatekeeper that supports the functionality to add the
destinationInfo parameter to the LCF message. In this case, the directory gatekeeper (DGK) that
translates the DNIS must keep track of the translation and add the translation to the LCF message
before the directory gatekeeper returns the message to the previous gatekeeper in the forwarding
chain. This behavior is based on the assumption that the LCF message has a return path that goes
through the DGK.
The fix for this behavior will cause the DGK to retain the destination information from the received
LRQ and the attached route server that modifies it (destination information) before the DGK
forwards the LRQ to the terminating gatekeeper. If the LCF message that is received from the TGK
does not have the destination information, the cached destination information is inserted into the
LCF and sent to the originating gatekeeper.
Conditions This symptom is observed on a Cisco gatekeeper.
Workaround There is no workaround.
•
CSCdv62549
Symptoms The Multiprotocol Label Switching (MPLS) tags that are associated with a virtual private
network (VPN) (vrf x.y.z.w) and a default route (0.0.0.0) are inconsistent between the main Cisco
Express Forwarding (CEF) table and the distributed CEF (dCEF) table on the outbound Versatile
Interface Processor (VIP) card.
Conditions This symptom is observed on a Cisco 7500 series router that is running Cisco IOS
Release 12.1(8a)E2.
Workaround To recover from this condition, enter the clear ip route vrf vrf-name EXEC command.
•
CSCdv62566
Symptoms A Cisco uBR7200 series universal broadband router that has several cable modem cards
installed may pause indefinitely and prevent console access.
Conditions This symptom is observed on a Cisco uBR7200 series that has several cable modem
cards installed.
Workaround Power-cycle the Cisco uBR7200.
•
CSCdv63719
Symptoms A NextPort modem card may fail to establish all channel-associated signaling (CAS)
calls that are made after the initial call is established.
Caveats for Cisco IOS Release 12.2
568
OL-3513-16 Rev. G0
Resolved Caveats—Cisco IOS Release 12.2(7)
Conditions This symptom is observed on a Cisco AS5800.
Workaround There is no workaround.
•
CSCdv63800
Symptoms If an Advanced Technology Attachment (ATA) disk is inserted after the router has booted
up, the inode numbers of the files that are displayed may not be correct. This symptom does not
occur if an ATA disk is removed and reinserted into the same slot while the router is running.
However, if the ATA disk that is removed is reinserted into a different slot, the inode information
that is displayed may be incorrect.
Conditions This symptom is observed on a Cisco router that has an ATA disk.
Workaround There is no workaround.
•
CSCdv64020
Symptoms A router may display “out of memory” errors when traffic is sent across a large number
of interfaces that are set up for IP Security (IPSec) protection, but the interfaces do not have any
established IPSec tunnels.
Conditions This symptom is observed on a Cisco 7200 series.
Workaround Arrange the network topology so that such traffic patterns do not occur.
•
CSCdv65014
The originating end of a Cisco AS5300 universal access server that is receiving ISDN overlap calls
may experience hung digital signal processors (DSPs) if there are no dial peer matches for the calls.
There is no workaround.
•
CSCdv65027
Symptoms The command-line interface (CLI) does not prompt for the erase keyword when the copy
[/erase] source-url destination-url EXEC command is entered. This behavior does not allow a file
system to be erased by entering the copy [/erase] source-url destination-url EXEC command.
Conditions This symptom is observed on a Cisco router.
Workaround Enter the erase filesystem: command before entering the copy EXEC command.
•
CSCdv66216
Symptoms A router may reload.
Conditions This symptom is observed when the show ip vrf EXEC command is entered for virtual
private network (VPN) routing/forwarding (VRF) instances that are being unconfigured by entering
the no ip vrf command script. This symptom affects releases that contain the Multiprotocol Label
Switching (MPLS) VPN feature.
Workaround Do not enter the show ip vrf EXEC command for VRF instances that are being
processed by the no ip vrf command script.
•
CSCdv66856
Symptoms Attempts to set up an IP Security (IPSec) connection with another router may fail.
Conditions This symptom is observed when an attempt is made on a router to set up an IPSec
connection with another router after the router is enrolled with a subordinate Certificate Authority
(CA).
Workaround There is no workaround.
•
CSCdv67011
Symptoms A router may reload because of a bus error.
Caveats for Cisco IOS Release 12.2
OL-3513-16 Rev. G0
569
Resolved Caveats—Cisco IOS Release 12.2(7):
Conditions This symptom is observed on a Cisco 7140.
Workaround There is no workaround.
•
CSCdv67136
Symptoms A Parallel Express Forwarding (PXF) complex may reload. The following output is
displayed when the show pxf crash EXEC command is entered:
PXF tmc: MAC XID: 00000001 IHB status: 0xFFBFF00F External memory exception on column
0 (0x00000004)
Conditions This symptom is observed on a Network Service Engine-1 (NSE-1).
Workaround Disable PXF by entering the no ip pxf global configuration command.
•
CSCdv67410
A Cisco 7200VXR router that is using any unchannelized serial port adapter (PA) and any processor
other than the Network Processing Engine (NPE-300) may experience line flaps at high traffic rates
and display the following message:
MUESLIX-1-HALT: Mx serial: Serial6/0 TPU halted: cause 0x3 status 0x00371A00
Carrier transitions and wedged output queues may also occur. This condition affects the following
port adapters:
– PA-T3
– PA-2T3
– PA-T3+
– PA-2T3+
Multichannel port adapters such as the PA-MC-T3 or the PA-MC-2T3+ are not affected. This
condition affects only the Cisco 7200VXR router. There is no workaround.
•
CSCdv67499
Symptoms When a Systems Network Architecture Switching Services (SNASw) port is configured
on an Ethernet interface with the Hot Standby Router Protocol (HSRP), it is possible to configure
the standby MAC address and use this address as a destination MAC address for downstream
devices. This feature allows for a redundant MAC address in an Ethernet or bridged network.
However, when the primary HSRP interface fails, the backup becomes HSRP active, but the SNASw
port transitions from active to inactive, and no connections can be made.
Conditions When this symptom occurs, it is necessary to restart the SNASw port using the snasw
start port port-name privileged EXEC command, where port-name is the name configured for the
SNASw port. This condition occurs only on platforms that contain Ethernet hardware that support
only unicast addresses.
This symptom may also occur if the MAC address on the interface has been changed, even if HSRP
is not configured. If the burned-in MAC address is overridden with the mac-address interface
configuration command, or if the value of the MAC address changes, the SNASw port will become
inactive and remain inactive. Thereafter, the SNASw port has to be manually reactivated by using
the snasw start port port-name privileged EXEC command.
When a fix is provided to use the standby address, the SNASw port will still be stopped and restarted
to use the new address. Normally this will cause all links that use the port to be disrupted. However,
as the port was previously in backup mode, there will be no use impact when the port is restarted.
Workaround There is no workaround.
Caveats for Cisco IOS Release 12.2
570
OL-3513-16 Rev. G0
Resolved Caveats—Cisco IOS Release 12.2(7)
•
CSCdv67719
Symptoms Output Distributed Committed Access Rate (DCAR) on a subinterface does not work in
distributed Cisco Express Forwarding (dCEF) mode for packets that are coming in from the same
Versatile Interface Processor (VIP).
Conditions This symptom is observed on a Cisco router that is running Cisco IOS Release 12.2(1).
Workaround Use the police feature that is provided by the service policy.
•
CSCdv68765
Symptoms If an Advanced Technology Attachment (ATA) disk is inserted after the router has booted
up, the inode numbers of the files that are displayed may not be correct. This symptom does not
occur if an ATA disk is removed and reinserted into the same slot while the router is running.
However, if the ATA disk that is removed is reinserted into a different slot, the inode information
that is displayed may be incorrect.
Conditions This symptom is observed on a Cisco router that has an ATA disk.
Workaround There is no workaround.
•
CSCdv68767
Symptoms The Cisco Express Forwarding (CEF) “receive” entry may not be created in the Virtual
Private Network routing/forwarding (VRF) instance for an imported secondary IP address. This
symptom may cause difficulties when the secondary IP address in the VRF instance is pinged.
Conditions This symptom is observed on a Cisco uBR7200 series.
Workaround There is no workaround.
•
CSCdv69322
Symptoms NO_RING_DESCRIPTORS and DSP_TIMEOUT errors may be observed on a
Cisco 2600 series when it places an analog call to another Cisco 2600 series on the terminating side.
Digital signal processor (DSP) timeout errors may also occur when the call is disconnected.
Conditions This condition is observed when the Compressed Real-Time Transfer Protocol (CRTP)
and fast switching are enabled. The same errors occurred when Cisco Express Forwarding (CEF)
was used. The voice port pauses indefinitely in the FXSLS_PARK state, and no calls can be made
through the voice port when this condition occurs. The paused voice port can be cleared by reloading
the router but the errors may reoccur.
Workaround Disable CRTP and enable fast switching, or enable CRTP and disable fast switching.
•
CSCdv69604
Symptoms A router may reload when certain modifications are made to a Frame Relay map class
while the Assured Forwarding (AF) policer is enabled.
Conditions This symptom is observed on a Cisco 7200 series that is running Cisco IOS
Release 12.2(3).
Workaround Shut down the affected interfaces before attempting to modify the Frame Relay map
class.
•
CSCdv69646
Symptoms New IP Security (IPSec) tunnels are not established.
Conditions This symptom is observed on a Cisco router under heavy load conditions with short
rekeying timers.
Workaround There is no workaround.
Caveats for Cisco IOS Release 12.2
OL-3513-16 Rev. G0
571
Resolved Caveats—Cisco IOS Release 12.2(7):
•
CSCdv69882
Symptoms When a fax-relay call is connected, a spurious memory access error may occur in the
ssaConnect function.
Conditions This symptom is observed on a Cisco AS5800.
Workaround There is no workaround.
•
CSCdv70222
Symptoms The show voicecard transcode EXEC command indicates that there are ten active
sessions, even when there are no active calls.
Conditions This condition is observed on a Cisco Catalyst 4224 access gateway switch.
Workaround Reload the Access Gateway Module (AGM).
•
CSCdv70284
Symptoms A router may not be able to download a file by using FTP. The vty session may pause
indefinitely when an attempt is made to download a file by using FTP.
Conditions This symptom is observed when a user attempts to download a file onto the router using
FTP.
Workaround Enter the copy tftp flash command to download the file by using TFTP instead of FTP.
•
CSCdv70677
Symptoms If a Cisco voice gateway receives a session initiation protocol (SIP) acknowledge (ACK)
request that does not match an existing call, the voice gateway will send back a “481 Call
Leg/Transaction does not exist” response instead of ignoring the ACK request.
Conditions This symptom is observed on a Cisco voice gateway.
Workaround There is no workaround.
•
CSCdv71337
Symptoms On a Cisco Catalyst 8540 MSR ATM switch router that has one CPU that is running
Cisco IOS Release 12.1(10.5) and another CPU that is running either an earlier Cisco IOS
Release 12.1 release or Cisco IOS Release 12.0, the contents of the flashcard are not listed when the
dir sec-slot0: EXEC command is entered and the contents of the bootflash are not listed when the
dir sec-bootflash: command is entered.
Conditions This symptom is observed on a Cisco Catalyst 8540 MSR ATM switch router that has
one CPU that running Cisco IOS Release 12.1(10.5) and another CPU that is running either an
earlier Cisco IOS Release 12.1 release or Cisco IOS Release 12.0.
Workaround Load the same image on both processors. Use the following upgrade procedure when
you are upgrading from an earlier release to Cisco IOS Release 12.1(10.5):
a. Ensure that the Cisco IOS Release 12.1(10.5) image is loaded on both the primary and
secondary flashcard or bootflash while the older image is still running on both processors. Note
that the prior image must be deleted from the device by entering the squeeze file-system: EXEC
command.
b. Modify the boot system global configuration command to specify the new image as the first
choice.
c. Copy the running configuration to the startup configuration.
d. Reload the secondary CPU so that it starts running the Cisco IOS Release 12.1(10.5) image.
e. After the secondary CPU comes back up, perform a switchover so that both processors are
running the Cisco IOS Release 12.1(10.5) image.
Caveats for Cisco IOS Release 12.2
572
OL-3513-16 Rev. G0
Resolved Caveats—Cisco IOS Release 12.2(7)
This compatibility condition will be corrected in releases following Cisco IOS Release 12.1(10.5).
•
CSCdv71453
Symptoms A router that is using IP with the Cisco Appliance Server Architecture (CASA) enabled
may reload when a client sends a large frame to the forwarding agent (FA). This large frame is then
fragmented outbound to the Local Director (LD) as the IP CASA header which causes the frame to
be larger than the interface maximum transmission unit (MTU) between the FA and the LD. In
return, the LD sends a bad IP CASA frame back to the FA, which can cause the router to reload. The
following error message is displayed when this condition occurs:
System returned to ROM by bus error at PC 0x0, address 0x0
A Local Director caveat has been created to track this issue (CSCdv70142). The Local Director code
was version 3.2.2.
Conditions This symptom is observed on a Cisco router that is running Cisco IOS Release 12.2(3).
Workaround Configure the client to send smaller packets.
•
CSCdv71487
Symptoms A router that is configured as an H.323 gatekeeper may reload with a bus exception error.
Conditions This symptom is observed on a Cisco router that is configured as an H.323 gatekeeper
when a Location Request (LRQ) timeout occurs. This symptom may affect the 7200-js image if the
router is used as an H.323 gatekeeper. The 7200-js image works normally if the router is not
configured as an H.323 gatekeeper.
Workaround There is no workaround.
•
CSCdv71868
Symptoms The tag-switching function does not work after it is enabled on a switch.
Conditions This symptom is observed on the Cisco Catalyst 8540, Cisco Catalyst 8510, and
Cisco LightStream 1010 switch router.
Workaround There is no workaround.
•
CSCdv72508
Symptoms The transmitter-delay delay interface configuration command is not supported with the
following WAN interface cards (WICs):
– Dual-serial port WAN interface card (WIC-2A/S)
– WIC-2A/S (on a Cisco 1700 router)
– 1-port serial WAN interface card (WIC-1T)
Conditions This symptom is observed on the cards listed above.
Workaround There is no workaround.
•
CSCdv72547
Symptoms A router may reload if NetFlow is sending packets that are locally generated through a
tunnel.
Conditions This symptom is observed on a Cisco router that is running Cisco IOS Release 12.2(5).
Workaround Disable Cisco Express Forwarding (CEF).
•
CSCdv72745
Symptoms An Access Gateway Module (AGM) may reset if the gatekeeper process on the AGM is
shut down by entering the command-line interface (CLI).
Caveats for Cisco IOS Release 12.2
OL-3513-16 Rev. G0
573
Resolved Caveats—Cisco IOS Release 12.2(7):
Conditions This symptom is observed on a Cisco Catalyst 4224 that has an AGM and that is running
Cisco IOS Release 12.2(5).
Workaround Do not enable the gatekeeper process.
•
CSCdv74851
Symptoms When a Cisco 6400 node route processor (NRP-1) is used in an integrated routing and
bridging (IRB) architecture, the NRP may experience a bus error and reload.
Conditions This symptom is observed on a Cisco 6400 that is running Cisco IOS Release 12.2(2b)
or Release 12.2(2)T1.
Workaround Disable Cisco Express Forwarding (CEF) switching globally by entering the no ip cef
global configuration command and use fast switching instead. Alternatively, a routed bridge
encapsulation (RBE) architecture can be used.
•
CSCdv75625
Symptoms A router may reload and display CPU hog messages.
Conditions This symptom is observed on a Cisco 4700 that is running the c4500-w3-mz image of
Cisco IOS Release 12.2 with DistributedDirector.
Workaround Configure a DistributedDirector access list to limit the number of host names for which
DistributedDirector performs load balancing.
•
CSCdv76445
Symptoms A router may not register with its gatekeeper after the router is reloaded.
Conditions This symptom is observed under rare circumstances on a Cisco 3660 that is configured
as a voice gateway.
Workaround To register the gateway with the gatekeeper, enter the shutdown interface
configuration command followed by the no shutdown interface configuration command on the Fast
Ethernet interface.
•
CSCdv76640
Symptoms When a PBX is passing Q-Signaling (QSIG) messages to other PBXs, a memory leak
may occur.
Conditions This symptom is observed on a Cisco 2600 series that is running Cisco IOS
Release 12.2(5).
Workaround There is no workaround.
•
CSCdv78225
Symptoms The formula that is used to calculate the signal-to-noise ratio (SNR) that is used by the
controller chip is incorrect. This DDTS corrects the formula that is used for calculating the SNR
values that are reported by the controller chip. This DDTS also implements the newest algorithm to
calculate the SNR as recommended by the chip manufacturer.
Conditions This symptom is observed on a Cisco uBR7200 series.
Workaround There is no workaround.
•
CSCdv79054
Symptoms A multichannel STM-1 Port Adapter (PA-MC-STM1) may lose a few hundred bytes of
memory each time a channel group is added or deleted.
Conditions This symptom is observed on a Cisco 7500 series that has a PA-MC-STM1 port adapter.
Workaround There is no workaround.
Caveats for Cisco IOS Release 12.2
574
OL-3513-16 Rev. G0
Resolved Caveats—Cisco IOS Release 12.2(7)
•
CSCdv80069
Symptoms “BADSHARE: Bad refcount in datagram_done” errors may be observed on a router
when hardware compression is enabled. The router stops forwarding the packet after this error
occurs.
Conditions This symptom is observed on a Cisco router that is running Cisco IOS Release 12.2(2)T.
The router has to be reloaded or power-cycled to be restored to a working condition.
Workaround There is no workaround.
•
CSCdv80102
Symptoms A one-way audio condition may occur after a call is transferred. The public switched
telephone network (PSTN) user can hear the IP phone user, but the IP phone user does not hear the
PSTN user.
Conditions This symptom is observed on a Cisco Catalyst 4224 that is running Cisco IOS
Release 12.1(5) or Release 12.2(5a) after codec selection changes are made within the transcoding
session.
Workaround There is no workaround.
•
CSCdv80116
A cable modem will not function if baseline privacy interface (BPI) is enabled.
Workaround: Disable BPI.
•
CSCdv82578
Symptoms An IP packet that is generated on a provider edge (PE) router (that is functioning in a
Multiprotocol Label Switching [MPLS] Virtual Private Network [VPN] environment) and that is
forwarded into the MPLS traffic engineered (TE) tunnel may not get to its destination even though
the packet may go out with multiple copies of the tunnel encapsulation.
Transit traffic is not affected by this symptom.
Conditions This symptom is observed if all of the following conditions are present:
– The packet is generated locally and is destined to a prefix in a VPN routing/forwarding (VRF)
table that is reachable through the MPLS cloud.
– The packet is sent out through an MPLS TE tunnel.
– There is load sharing to get to the remote PE router.
Workaround Avoid load sharing in the core.
Alternate Workaround Do not run the VPN or the TE feature.
•
CSCdv83850
Symptoms An ATM circuit emulation service (CES) port adapter (PA-A2) may send out Operation,
Administration, and Maintenance (OAM) cells that have several seconds of delay and cause the line
protocol to go down when the port adapter is overloaded. This symptom does not affect the enhanced
ATM port adapter (PA-A3).
Conditions This symptom is observed on the PA-A2 port adapter.
Workaround There is no workaround.
•
CSCdv83946
Symptoms On a serial link that has both Weighted Fair Queuing (WFQ) and Multilink PPP (MLP)
enabled in its configuration, the link may jam and cease further transmission.
Caveats for Cisco IOS Release 12.2
OL-3513-16 Rev. G0
575
Resolved Caveats—Cisco IOS Release 12.2(7):
Conditions This condition occurs under rare circumstances while the link is an active member of a
multilink bundle when the link goes down because of a physical link failure and comes back up again
later to join a bundle. This sequence may occur, for example, if a serial cable for a live connection
is unplugged and then reconnected.
This condition can be recognized by entering the show interface EXEC command on the serial link
in question and examining the output queue count for the interface. When this condition is present,
the output queue has an extremely large value (a value that is actually a negative number but is
printed as a large positive number).
Workaround This condition can be avoided by configuring the serial link to use FIFO queuing
instead of fair queuing.
•
CSCdv84086
Symptoms In Cisco IOS software that is running Multiprotocol Label Switching (MPLS) Traffic
Engineering (TE), the Link Management (LM) module may remove a Label Switched Path (LSP)
while it is in the process of preempting other LSPs in order to admit the original one. This may result
in a software reload.
Conditions This symptom is observed if a teardown request for the LSP is received immediately
after a reservation request is received for the same LSP. The problem is triggered only when the
preemption of other LSPs is necessary in order to admit the LSP in question, or when an unlikely
timing of interactions between LM and RSVP occurs.
Workaround There is no workaround.
•
CSCdv84504
Symptoms Calls that are sent through a unit under test by using E1 R2 and H.323 signaling do not
contain any calling party information in the Q.931 setup that is sent through the IP cloud. This
condition does not occur if the incoming interface is an ISDN interface.
Conditions This symptom is observed on a router that is running Cisco IOS Release 12.2(5).
Workaround There is no workaround.
•
CSCdv84510
Symptoms The Token Ring Inter-Switch Linking (TR-ISL) encapsulation is not listed as a
subinterface encapsulation option on the command-line interface (CLI) when the encapsulation
encapsulation-type interface configuration command is entered on a Cisco 4500 router.
Conditions This symptom is observed on a Cisco 4500 that is running Cisco IOS Release 12.1(10).
Workaround There is no workaround.
•
CSCdv84526
Symptoms The cable modem can be restored to its factory default settings by entering the write
erase command followed by a reload. The expected behavior is for the docsDevSwAdminStatus
MIB to be set to the allowProvisioningUpgrade MIB during the initialization cycle. However, the
modem sets the MIB variable to 0, which is an undefined value. As a result, software upgrade
information that is contained in the configuration file is ignored.
Conditions This symptom is observed on a Cisco CVA122, Cisco uBR905, Cisco uBR910,
Cisco uBRr924, and Cisco uBR925 that is running Cisco IOS Release 12.2(6) or Release 12.2 T.
Workaround Use the Simple Network Management Protocol (SNMP) to set the MIB object to the
correct state.
•
CSCdv86358
Symptoms A router may reset after a row is activated in the cfcRequestTable.
Caveats for Cisco IOS Release 12.2
576
OL-3513-16 Rev. G0
Resolved Caveats—Cisco IOS Release 12.2(7)
Conditions This symptom is observed on a Cisco 6400 that is running Cisco IOS Release 12.2(2b).
Workaround There is no workaround.
•
CSCdv86818
Symptoms When low latency queueing (LLQ) is configured in a policy map, inherent policing may
be activated according to the parameters of the priority queue (rate and burst-size). Drops can be
observed when policing is applied, even when the burst size has not been reached (not congested).
The packets are process switched and policed regardless of the congestion level.
Conditions This symptom is observed on a Cisco router that is running Cisco IOS Release 12.2(4)T.
This symptom is observed when express forwarding (EF) is not configured with the assured
forwarding (AF3) drop preference level.
Workaround There is no workaround.
•
CSCdv88497
Symptoms The TCP dropback feature of a router may cause upstream data packets to be dropped.
Conditions This symptom is observed on a Cisco uBR900 router. This symptom may significantly
affect the performance of upstream FTP transfers and can affect other types of TCP upstream
data-type traffic.
Workaround There is no workaround.
•
CSCdv89358
Symptoms When Committed Access Rate (CAR) is implemented for every source IP address on a
Cisco 7600 series router that has a FlexWAN card, the card may reload when there is high volume
of traffic (200k packets/s).
Conditions This symptom is observed on a Cisco 7600 series router that has a FlexWAN card.
Workaround There is no workaround.
•
CSCdv89981
Symptoms A router may reload if the ds0-group 30 controller configuration command is configured
on any time slot and used with any signaling type on the last controller of an E1 trunk card.
Conditions This symptom is observed on a Cisco AS5400.
Workaround Avoid using 30 as the group number in the last controller.
•
CSCdv90913
Symptoms A Cisco AS5300 that has T1 controller Extended Superframe (ESF) framing may not
indicate that it is in the remote loopback mode if the loopback remote interface configuration
command is configured to send in-band loopback packets through a channel service unit (CSU).
Conditions This symptom is observed on a Cisco AS5300 that is running Cisco IOS Release 12.2.
Workaround There is no workaround.
•
CSCdv90919
Symptoms When a user configures an ISDN trunk for overlap receiving and sends a setup message
with no called party number in order to obtain a dial tone, the connected PBX allows the calling
party to hear the dial tone but continues to collect digits that are sent over the ISDN link as INFO
messages. If the router has an incoming dial peer that has an exact match to the calling party number,
a progress indicator (PI) value is not returned in the SETUP_ACK message. This behavior prevents
the dial tone on the router from being heard.
Conditions This symptom is observed on a Cisco router that has an ISDN trunk that is configured
for overlap receiving. This symptom is observed with Cisco IOS Release 12.2(6).
Caveats for Cisco IOS Release 12.2
OL-3513-16 Rev. G0
577
Resolved Caveats—Cisco IOS Release 12.2(7):
Workaround There is no workaround.
•
CSCdw00055
Symptoms The non-variable-length dial-plan matching character “$” permits a user to force a match
on a destination pattern that consists of a fixed number of digits. The affected user has calls to phone
numbers that share the same first set of prefix digits, but the user has a complete set of digits that
are different in number. In the sample configuration below, calls to router 1 (RTR 1) have 9 digits
that start with “01152” while calls to router 2 (RTR 2) have 11 digits that start with “01152”.
dial-peer voice 1 voip
destination-pattern 01152....$
session target ipv4:IP_ADDR_RTR1
ip precedence 5
dial-peer voice 2 voip
destination-pattern 01152......
session target ipv4:IP_ADDR_RTR2
ip precedence 5
To eliminate the ambiguity as to which dial peer matches the destination pattern that consists of a
fixed number of digits, the “$” character is used, so that a call to RTR 2 will not match on dial peer 1.
This configuration works with Cisco IOS Release 12.1 and 12.2(1a) images that support the “$”
dial-peer matching character.
However, in Cisco IOS Release 12.2(1.1) and Release 12.2(2)T1, the dial plan no longer permits a
destination pattern that terminate with the “$” character to be matched at all; thus, the dial plan
prevents calls that use the specific dial peer to be completed.
Conditions This symptom is observed on a Cisco router that is running Cisco IOS Release 12.2(1.1)
or Release 12.2(2)T1.
Workaround Configure the destination-pattern interface configuration command to end in “T?$”
instead of the “$” character.
•
CSCdw00333
A service policy is not applied to a Fast Ethernet interface after the configuration is saved to
NVRAM and after a router is reloaded. This condition was observed on a Cisco 2600 series router
that was running Cisco IOS Release 12.2(5) and on a Cisco 1700 series router that was running
Cisco IOS Release 12.2(4)T. There is no workaround.
•
CSCdw00559
Symptoms When a user attempts to delete an entry from the ipNetToMediaTable table and if the
associated ifIndex value is greater than the number of nonvirtual interfaces in the system, the user
cannot delete the entry successfully and receives a “WrongValue” error. This behavior has been
fixed by removing the relevant logic.
Conditions This symptom is observed on a Cisco router that is running Cisco IOS Release 12.1 E.
Workaround There is no workaround.
•
CSCdw01123
Symptoms The channel-group timeslots timeslot-list controller configuration command cannot be
configured if a preceding attempt to configure the pri-group [timeslots range] controller
configuration command is not successful. This symptom is observed if the channel-group timeslots
timeslot-list controller configuration command covers the same timeslot range on one T1 controller.
The following is a sample output of what a user may see when this symptom occurs:
Router(config-controller)# pri-group timeslots 1-24
%Controller tdm clock does not have data capability
%Insufficient HDLC resource for pri-group - it has been removed
Caveats for Cisco IOS Release 12.2
578
OL-3513-16 Rev. G0
Resolved Caveats—Cisco IOS Release 12.2(7)
Router(config-controller)# channel-group 5 timeslots 1-24
%Timeslot 24 already used by unknown group #00000017
Conditions This symptom is observed on a Cisco router only if a user attempts to configure the
channel-group timeslots timeslot-list controller configuration command immediately after an
unsuccessful preceding attempt to configure the pri-group [timeslots range] controller
configuration command.
Workaround Reload the router.
•
CSCdw01406
Symptoms A router may stop passing traffic after one of the B channels is dropped because the load
on the channel falls below the load threshold.
Conditions This symptom is observed only when a 1-port ISDN-BRI WAN interface card
(WIC-1B-S/T) is plugged into a 2 10/100 Ethernet 2 WAN card slot network module (NM-2FE2W).
Two Cisco 3600 routers that were running Cisco IOS Release 12.2(3b) exhibited this behavior when
one of the routers used a BRI to dial into the other router that has a PRI. This symptom does not
occur when Cisco IOS Release 12.1(5)T9 is used.
Workaround Configure the dialer load-threshold 1 interface configuration command on the
affected interfaces.
•
CSCdw02805
Symptoms When Connectionless Network Service (CLNS) traffic is sent through an ATM
permanent virtual circuit (PVC) that has quality of service (QoS) configured, traceback messages
that are related to hqf_vip_decode_encaps may be displayed.
Conditions This symptom is observed on a Cisco 7500 series that is running Cisco IOS
Release 12.2(4)T.
Workaround There is no workaround.
•
CSCdw02869
Symptoms A Cisco 7206VXR router that is configured with Multiprotocol Label Switching (MPLS)
and the Web Cache Communication Protocol (WCCP) may reload because of a bus error and display
the following message in the log:
%ALIGN-1-FATAL: Corrupted program counter pc=0x0, ra=0x60F82504, sp=0x628D48F0
%ALIGN-1-FATAL: Corrupted program counter pc=0x0, ra=0x60F82504, sp=0x628D48F0
The crashinfo file will contain the following message:
Unexpected exception, CPU signal 10, PC = 0x0
$0 : 00000000, AT : 00000030, v0 : 00000000, v1 : 00000001
a0 : 6333CA68, a1 : 628A1428, a2 : 5E19160A, a3 : 6325DB98
t0 : 0000883E, t1 : 62BF8700, t2 : 629D80A0, t3 : 625D0000
t4 : 00000030, t5 : 00000000, t6 : D4989620, t7 : 6333CA68
s0 : 00000003, s1 : 00000000, s2 : 62942B80, s3 : 628A144C
s4 : 6293B998, s5 : 628A1428, s6 : 6293A714, s7 : 5E1915E0
t8 : 6060E108, t9 : 62A62468, k0 : 00000000, k1 : 00000000
gp : 6238A280, sp : 628D48F0, s8 : 628D4BA8, ra : 60F82504
EPC : 00000000, ErrorEPC : 604E54D4, SREG : 3400F903
Cause 00000008 (Code 0x2): TLB (load or instruction fetch) exception
-Traceback= 0 60F82504 60F81F58 60F89848 601053F0 601091A0
Conditions This symptom is observed on a Cisco 7206VXR that is running Cisco IOS
Release 12.2(6).
Workaround Disable the WCCP redirection.
Caveats for Cisco IOS Release 12.2
OL-3513-16 Rev. G0
579
Resolved Caveats—Cisco IOS Release 12.2(7):
•
CSCdw03079
Symptoms The “IPC LC Message Handler” process takes up a large amount of CPU memory to
perform a statistics update.
Conditions This symptom is observed when a Cisco AS5850 that is handling a heavy call load.
Workaround There is no workaround.
•
CSCdw03762
Symptoms A router that is configured for E1 R2 signaling and has r2-xxx r2-non-compelled register
configured may experience calls that do not go through. However, r2-compelled and
r2-semi-compelled calls are going through.
Conditions This symptom is observed on a Cisco 7200 series.
Workaround There is no workaround.
•
CSCdw04473
A dial shelf controller (DSC) card may reload after the dir slot0: or show slot0: command is entered
after a Personal Computer Memory Card International Association (PCMCIA) card is removed and
reinserted. This condition affects Cisco IOS Release 12.2(1)XS1 and Release 12.2(6). There is no
workaround.
•
CSCdw05298
Symptoms A Cisco DistributedDirector (DD) either may not return a Canonical Name (CNAME)
record in response to a Domain Name System (DNS) query for a host name when it is supposed to
or may return an incorrect CNAME record in response to a DNS query for a host name that is an
official name.
Conditions This symptom is observed on a Cisco DistributedDirector (DD) that is running
Cisco IOS Release 12.1 or Release 12.2.
Workaround There is no workaround.
•
CSCdw07307
Symptoms When debit card calls are made, the user hears a dial tone instead of prompts because the
debit card Tool Command Language (TCL) script could not be loaded from the remote server. This
is a normal default behavior, but it poses a security issue. Without the prompts for account number
and password, calls can proceed to complete the two stage dialing without being required to be
authenticated or pay for the toll.
Conditions This symptom is observed on a Cisco AS5400 that is running Cisco IOS
Release 12.2(2)XB.
Workaround Run the debit card TCL script from Flash memory instead.
•
CSCdw07967
Symptoms A router that is configured with class-based weighted fair queueing (CBWFQ) and
Weighted Random Early Detection (WRED) on Frame Relay virtual circuits (VCs) that are
configured with Frame Relay IP Real Time Protocol (RTP) header compression may reload.
Conditions This symptom is observed on a Cisco router that is running Cisco IOS Release 12.2.
Workaround There is no workaround.
•
CSCdw08302
Symptoms An interface on a router may go down if the router has a fast serial port adapter and that
is using any processor other than the Network Processing Engine (NPE-300). The following
message may be displayed when this symptom occurs:
Caveats for Cisco IOS Release 12.2
580
OL-3513-16 Rev. G0
Resolved Caveats—Cisco IOS Release 12.2(7)
%MUESLIX-1-STARTFAIL: Mx serial, Serial3/0 Start Failed at enable port
%MUESLIX-1-STOPFAIL: Mx serial, Serial3/2 Stop Failed at disable port
Conditions This symptom is observed on a Cisco 7200VXR router that is using any processor other
than the Network Processing Engine (NPE-300) and that is running Cisco IOS Release 12.2(4.1) or
a later release while a fast serial port adapter (such as the 4-port serial port adapter [PA-4T+] or the
8-port serial port adapter [PA-8T]) is used.
Workaround Perform an online insertion and removal (OIR) on the port adapter interface.
•
CSCdw09507
On a terminating router that is running Cisco IOS Release 12.2(6) and that is configured for ISDN
or Signaling System 7 (SS7), if the router sends an ALERT message without a progress indicator
(PI), a dial tone is heard instead of a ringback tone.
Workaround, Configure the terminating router to always send a PI with the ALERT message. If we
send CC_PROG_INBAND (PI = 8) in the alert message, a ringback will be received.This can be
accomplished by configuring the progress_ind alert enable 8 dial peer configuration command on
the outgoing plain old telephone service (POTS) dial peer of the terminating router.
•
CSCdw09570
Symptoms If the debug condition interface EXEC command is used to enable conditional
debugging on an interface, some serial debugs such as High-Level Data Link Control (HDLC)
keepalive debugs will also be enabled even if the debug serial interface EXEC command is not
configured.
Conditions This symptom is observed on a Cisco 10000 series that is running Cisco IOS
Release 12.0 ST.
Workaround There is no workaround.
•
CSCdw13574
When more than one permanent virtual connection (PVC) is configured, the ATM Circuit Emulation
Services (CES) port adapter (PA-A2) may receive output drops when the peak cell rate (PCR) is
reached. The interface continues to experience output drops even after the traffic flow is stopped.
The output drops stop after the shutdown interface configuration command is entered on the
interface followed by the no shutdown interface configuration command. There is no workaround.
•
CSCdw14254
ISDN interfaces are not usable because the isdn spid interface configuration command that assigns
service profile identifier (SPIDs) for the channels is not accepted. When this behavior occurs, the
interface cannot communicate properly with ISDN switches. There is no workaround.
•
CSCdw16710
Real-Time Transport Protocol (RTP) header compression becomes inactive on a Frame Relay
subinterface after a header compression instance is deleted using the no frame-relay ip rtp
header-compression interface configuration command while fast switching is used with IP header
compression.
Workaround: Reenable header compression on the subinterface using the frame-relay ip rtp
header-compression interface configuration command.
•
CSCdw18482
When a vendor-specific Mobile Station (MS) talks to a Cisco gateway general packet radio service
(GPRS) support node (GGSN), the MS may send the “IP Header Compression” IP Control Protocol
(IPCP) option when it is activating the Protocol Data Packet (PDP) context. Cisco GGSN will
always reject this PDP context request because this option is not supported by GGSN.
Caveats for Cisco IOS Release 12.2
OL-3513-16 Rev. G0
581
Resolved Caveats—Cisco IOS Release 12.2(7):
Cisco GGSN should instead accept this PDP context request (if authentication and other
configurations are successful) and reject the IPCP option. The idea is to allow GGSN to reject IP
header compression but not reject the PDP context. GGSN should reject any unsupported IPCP
option but GGSN should allow the PDP context to go through if authentication is successful. There
is no workaround.
•
CSCdw20152
When a Quality of Service (QoS) service policy with bandwidth {kbps} command is attached to an
ATM permanent virtual connection (PVC), the following error message may be displayed:
bandwidth assignment must be at least 1% of link rate
Workaround: Use the bandwidth percent {value} command instead.
•
CSCdw21652
When a quality of service (QoS) service policy that has the bandwidth kbps command is attached
to an ATM permanent virtual circuit (PVC), the following error message may be displayed:
bandwidth assignment must be at least 1% of link rate
Workaround: Use the bandwidth percent command instead.
•
CSCdw25191
A Cisco router may reload if the no tag ip global configuration command is entered after the router
has rebooted. This condition occurs when the no tag ip global configuration command is entered
after thousands of tag bindings have been established for hundreds of destinations.
Workaround: Use the no tag ip interface configuration command on each interface instead of using
the no tag ip global configuration command on the router.
•
CSCdw27574
In Cisco IOS Release 12.2(6.7), the maximum digit length is reduced from 128 to 13 digits in a
replacement pattern for translation rules.
Workaround: Split the translation and configure part of the translation on the inbound leg and the
other half of the translation on the outbound leg.
•
CSCdw33027
While fixing vulnerabilities mentioned in the Cisco Security Advisory: Multiple SSH
Vulnerabilities (http://www.cisco.com/warp/public/707/SSH-multiple-pub.html) we inadvertently
introduced an instability in some products. When an attacker tries to exploit the vulnerability
VU#945216 (described in the CERT/CC Vulnerability Note at
http://www.kb.cert.org/vuls/id/945216) the SSH module will consume too much of the processor’s
time, effectively causing a DoS. In some cases the device will reboot. In order to be exposed SSH
must be enabled on the device.
Affected product lines are:
* All devices running Cisco IOSÆ Software supporting SSH. This includes routers and switches
running Cisco IOS Software.
* Catalyst 6000 switches running CatOS.
* Cisco PIX Firewall.
* Cisco 11000 Content Service Switch family.
No other Cisco product is vulnerable. It is possible to mitigate this vulnerability by preventing, or
having control over, the SSH traffic.
This advisory is available at http://www.cisco.com/warp/public/707/SSH-scanning.shtml.
Caveats for Cisco IOS Release 12.2
582
OL-3513-16 Rev. G0
Resolved Caveats—Cisco IOS Release 12.2(7)
•
CSCin00545
Packets are switched by a Route Switch Processor (RSP) instead of a Versatile Interface Processor
(VIP) when distributed Cisco Express Forwarding (dCEF) is enabled. To determine if this condition
is occurring, issue the show ip cef summary command and the show cef interface command on the
RSP and the VIP. The router is switching using Cisco Express Forwarding (CEF) via the RSP instead
of the VIP if you receive the following output when you enter each of the commands on the RSP and
the VIP:
RSP# show ip cef summary
IP Distributed CEF with switching
VIP# show ip cef summary
IP Distributed CEF without switching
RSP# show cef interface
POS4/0/0 is up (if_number 22)
IP Feature CEF switching turbo vector
VIP# show cef interface
POS4/0/0 is up (if_number 22)
IP VIP to RSP switching turbo vector
There is no workaround.
•
CSCuk28041
Symptoms If an ISDN Signaling System 7 (SS7) call from a Cisco SC 2200 signaling controller and
a Cisco AS5800 access server is terminated from the Cisco SC2200 signaling controller with a
specific termination code, the code may not be propagated to the call source.
Conditions This symptom is observed on a Cisco SC 2200 signaling controller and a Cisco AS5800
universal access server that is running Cisco IOS Release 12.1(5)XM4.
Workaround There is no workaround.
•
CSCuk28260
Symptoms When a Versatile Interface Processor (VIP) on a Cisco 7500 series runs out of memory
and a memory allocation failure (MALLOCFAIL) occurs, the VIP may reload and the following
error message will be displayed:
0:04:46: %SYS-2-MALLOCFAIL: Memory allocation of 65556 bytes failed from 0x600A7F14,
pool Processor, alignment 16
-Process= "CEF IPC Background", ipl= 2, pid= 8
-Traceback= 600AB18C 600AC958 600A7F1C 600A8868 602BEABC 602BF444 602BF6E4 60296B5C
6029C498 6029F674 602A7C90 602B2A74 602B0AAC 602B0D1C 602B0E94 602B15BC
00:04:46: %FIB-4-RADIXINSERT: Error trying to insert prefix entry for X.X.X.X/32
%ALIGN-1-FATAL: Illegal access to a low address addr=0x66, pc=0x60299DC0,
ra=0x60299DB4, sp=0x60F514D8
Conditions This symptom is observed on a Cisco 7500 series that has a VIP that is running
Cisco IOS Release 12.0 ST.
Workaround There is no workaround.
•
CSCuk30474
A line card may be stuck in an off-for-download state on a Cisco 7500 router or a Cisco 12000 router.
This condition is indicated by the output of the show cef linecard EXEC command. This condition
is caused by an interprocess communication (IPC) error with another line card during the
Forwarding Information Base (FIB) table download process. There is no workaround.
Caveats for Cisco IOS Release 12.2
OL-3513-16 Rev. G0
583
Resolved Caveats—Cisco IOS Release 12.2(7):
TCP/IP Host-Mode Services
•
CSCdv38764
Symptoms When a file transfer is initiated from a front-end processor (FEP) that is attached to a
Cisco 7204 router and destined to an FEP that is attached to a Cisco 2612 router, the show tcp EXEC
command does not show retransmitted packets or that the retransmission timeout timer is waking
up. Several acknowledgements (ACKs) are seen when the show tcp brief [all] EXEC command is
entered. In Cisco IOS Release 12.2(4.2), a large number of “fast transmitted” packets are shown on
the Cisco 7204 when the show tcp EXEC command is entered.
Conditions This symptom is observed when Cisco IOS Release 12.0(7)T is running on both the
Cisco 7204 FEP and the Cisco 2612 FEP that are connected through a Fast Ethernet (FE) connection
with equal cost and the Enhanced Interior Gateway Routing Protocol (EIGRP) enabled.
Workaround Eliminate equal cost network paths.
•
CSCdv51360
Symptoms A data-link switching (DLSw) peer may be stuck in the AB_PEND state and a TCP
session may be stuck in the SYNSENT state after an IP outage occurs between two DLSw routers.
Conditions This symptom is observed on a Cisco router that is running Cisco IOS Release 12.1(3)T.
Workaround Use the show tcp brief EXEC command to determine the Transmission Control Block
(TCB) of the hung TCP session. Enter the clear tcp tcb address privileged EXEC command to clear
the TCB of the hung TCP session. The DLSw peers will reconnect as long as there is IP connectivity
between the DLSw peers.
VINES
•
CSCdv81746
Symptoms A router that has more than 1000 Banyan Virtual Integrated Network Service (VINES)
routes may reload when the clear vines neighbor * EXEC command is entered.
Conditions This symptom is observed on a Cisco 3600 series that is running Cisco IOS
Release 12.2(5.08).
Workaround Ensure that no VINES debugging commands, such as the debug vines routing
command or the debug vines state command, are enabled.
Wide-Area Networking
•
CSCds38864
Symptoms A router may reload or display spurious memory access traceback messages when the
show int virtual-access x configuration EXEC command is entered.
Conditions This symptom is observed on a Cisco router that is running a Packet Data Serving Node
(PDSN) image of Cisco IOS Release 12.1(3)XS.
Workaround There is no workaround.
•
CSCdu62228
Symptoms A memory corruption may occur on a Versatile Interface Processor 2 model 50 (VIP2-50)
and a PA-A1-OC3 port adapter when cell mode Multiprotocol Label Switching (MPLS) is
performed.
Caveats for Cisco IOS Release 12.2
584
OL-3513-16 Rev. G0
Resolved Caveats—Cisco IOS Release 12.2(7)
Conditions This symptom is observed on the interface of the VIP on a Cisco 7500 series that is
running Cisco IOS Release 12.1(8) when resources are low for the Tag Virtual Circuits (TVCs) on
the interface of the VIP.
Workaround There is no workaround.
•
CSCdu88657
Symptoms Some issues may be observed with distributed Cisco Express Forwarding (CEF) when an
access group is configured on a dialer interface that is bound to a PRI.
Conditions This symptom is observed on a Cisco 7500 series that is running Cisco IOS Release 12.2.
Workaround Reload the Cisco 7500 series with the access group and dCEF in the configuration. The
access group cannot be removed and reconfigured on the dialer interface.
•
CSCdv00201
Symptoms With some Cisco IOS 12.2 PI development releases, when PPP hardware compression is
configured and enabled on a PPP over Frame Relay circuit (meaning that the router is equipped with
the proper compression hardware and the PPP link peer is also running PPP compression), a system
may reload.
Conditions This symptom is observed on a Cisco router that is running a Cisco IOS Release 12.2 PI
development release.
Workaround There is no workaround.
•
CSCdv14997
Symptoms A memory leak may be observed with the Integrated Local Management Interface (ILMI)
response on a router.
Conditions This symptom is observed on a Cisco 3660 that is running Cisco IOS Release 12.2(1a)
Workaround There is no workaround.
•
CSCdv19662
Symptoms On configurations that have the ISDN switchtype set to primary-ni, if a STATUS message
is received from the switch and both sides of the call do not have a matching call state, the STATUS
message is responded to with a RELEASE message and the call is subsequently torn down.
Conditions This symptom is observed on a Cisco AS5300 that is running Cisco IOS
Release 12.2(2)XA.
Workaround There is no workaround.
•
CSCdv22680
Symptoms A Cisco AS5300 that is running Cisco IOS Release 12.1(6.01) and has ISDN Large Scale
Dialout (LSDO) configured in a point of presence (POP) with Multilink PPP (MMP) may reload
repeatedly with a corrupted counter.
Conditions This symptom is observed on a Cisco AS5300 that is running Cisco IOS Release
12.1(6.01) or Release 12.1(8).
Workaround There is no workaround.
•
CSCdv30179
Symptoms A router may display the following message on the console:
%SCHED-2-WATCH: Attempt to enqueue uninitialized watched queue (address 0). -Process=
"IP Input", ipl= 0, pid= 14 -Traceback= 6025A7F0 6022B564 606B97C0 6022B4AC 60474608
604768E8 602CC4B4 602CA9B0 602CAAAC 602CAC20 60246F64 60246F50
Conditions This symptom is observed on a Cisco 3640 that is running Cisco IOS Release 12.0(17).
Caveats for Cisco IOS Release 12.2
OL-3513-16 Rev. G0
585
Resolved Caveats—Cisco IOS Release 12.2(7):
Workaround There is no workaround.
•
CSCdv32421
Symptoms When a Layer 2 Tunneling Protocol (L2TP) dials out on a dialer profile interface, a L2TP
Network Server (LNS) may fail to attempt successive calls after the first call is torn down.
Conditions This symptom is observed on a Cisco 7200 series that is running Cisco IOS Release
12.2(3.5) or Release 12.2(3.6)T2.
Workaround There is no workaround.
•
CSCdv38127
Symptoms A router that is using Multilink PPP (MLP), Virtual Private Dialup Network (VPDN),
Multiprotocol Label Switching (MPLS), and has keepalives enabled may reload when the router is
attempting to bring up the second link.
Conditions This symptom is observed on a Cisco router that is using MLP, VPDN, MPLS, and has
keepalives enabled when the router is attempting to bring up the second link.
Workaround Disable keepalives.
•
CSCdv42491
Symptoms A router may reload with a bus error displaying the following error message:
%ALIGN-1-FATAL: Illegal access to a low address addr=0x50, pc=0x6135D584,
ra=0x60636AD0, sp=0x62338E68
Conditions This symptom is observed on a Cisco 7200 router.
Workaround There is no workaround.
•
CSCdv42995
Symptoms Callback calls are not made when user profiles are obtained from authentication,
authorization, and accounting (AAA) and a callback server may reload when the clear interface
dialer EXEC is entered.
Conditions This symptom is observed on a Cisco AS5300 that is running Cisco IOS Release 12.2 T.
Workaround There is no workaround.
•
CSCdv48783
Symptoms When a router is configured to switch X.25 over TCP (XOT) traffic, the router may not
be able to include necessary flow control facility in the call confirm packet that is going to the source
X.25 host.
Conditions This symptom is observed when the flow control facility that is specified by the source
X.25 host differs from the facility that is required by the destination host.
Workaround Enforce facility negotiation by entering the x25 routing acknowledge local global
configuration command and the x25 subscribe flow-control always global configuration command.
•
CSCdv55637
Symptoms When a virtual connection (VC) is torn down on the port adapter, the le-arp entries
continue to use the VC.
Conditions This symptom is observed on a Cisco 7500 series that has a dual-width ATM port adapter
(PA-A3-OC12). This symptom occurs when there are vendor-specific workstations attached via
ATM that are using FORE ATM NIC drivers.
Workaround Enter the clear lane le-arp privileged EXEC command on the Cisco 7500 series.
Caveats for Cisco IOS Release 12.2
586
OL-3513-16 Rev. G0
Resolved Caveats—Cisco IOS Release 12.2(7)
•
CSCdv56962
Symptoms A router that has the dialer watch-group group-number interface configuration
command configured on the BRI interface may reload and display the following messages when the
no shutdown interface configuration command is entered on the BRI interface:
00:09:11: %LINK-3-UPDOWN: Interface BRI0:1, changed state to down 00:09:11:
%LINK-3-UPDOWN: Interface BRI0:2, changed state to down 00:09:12: TDMB channel # 99
Timeslots ( X 48K, . 56K,* 64K, - skipped)
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 00:09:12:
00:09:12: % Clock rate line <speed> is not configured (or incorrect) on Serial 1
00:09:12: %LINK-3-UPDOWN: Inte
=== Flushing messages ===
Queued messages: CPU exception: reason = FORCE_CRASH(1495518) sigval = 1200 Last CPU
Exception Register Context: PC = 0x0011bde4 MSR = 0x00009032 CR = 0x39000039 LR =
0x0011bda4 CTR = 0x002f2914 XER = 0xa000403b DAR = 0x906000a8 DSISR = 0x000000e7 DEC
= 0x0000e920 TBU = 0x00000000 TBL = 0x52b8bcc5 IMMR = 0x30000013 R0 = 0x00000000 R1
= 0x01aa8788 R2 = 0x00020000 R3 = 0x00000000 R4 = 0x00000000 R5 = 0xffffff00 R6 =
0x01682448 R7 = 0x906000a0 R8 = 0x30000000 R9 = 0x01aa655c R10 = 0x01aa64e0 R11 =
0x00000000 R12 = 0x00000003 R13 = 0x00013430 R14 = 0x00000000 R15 = 0x00000000 R16 =
0x00000000 R17 = 0x00000000 R18 = 0x01664118 R19 = 0x00000001 R20 = 0x00000000 R21 =
0x00000000 R22 = 0x00000000 R23 = 0x00000000 R24 = 0x016842e4 R25 = 0x00000000 R26 =
0x00e00000 R27 = 0x013d0000 R28 = 0x01682448 R29 = 0x00000000 R30 = 0x0168517c R31 =
0x01664118
Stack trace:
Frame 00: SP = 0x01aa8788 PC = 0x0011bde4 Frame 01: SP = 0x01aa8800 PC = 0x00149350
Frame 02: SP = 0x01aa8828 PC = 0x001600d4 Frame 03: SP = 0x01aa8848 PC = 0x00303750
Frame 04: SP = 0x00000000 PC = 0x7c6802a6
Conditions This symptom is observed on a Cisco MC3810 series router that is running Cisco IOS
Release 12.2(3) or Release 12.0(7))XK2.
Workaround There is no workaround.
•
CSCdv57479
Symptoms When users configure a virtual routing/forwarding (VRF) instance and the ip
unnumbered type number interface configuration command under a PPP subinterface, the
Data-Link Connection Identifier (DLCI) changes under that subinterface may cause ping failures
even when DLCI is active.
Conditions This symptom is observed on a Cisco 7500 series router that is running Cisco IOS
Release 12.1(8a)E.
Workaround Enter the shutdown interface configuration command followed by the no shutdown
interface configuration command on the PE router.
•
CSCdv60021
Symptoms When E1 channels are configured to receive ISDN-PPP calls, the channels may not
achieve the full 64 kBps bandwidth capacity of a B channel.
Conditions This symptom is observed on a Cisco 7200 series that has a dialer interface and that is
running Cisco IOS Release 12.1(9).
Workaround To avoid this symptom, configure the ppp multilink interface configuration command
on the dialer interface associated with the E1 channels.
Caveats for Cisco IOS Release 12.2
OL-3513-16 Rev. G0
587
Resolved Caveats—Cisco IOS Release 12.2(7):
•
CSCdv60341
Symptoms A vendor-specific Layer 2 Tunneling Protocol (L2TP) Access Concentrator (LAC) is not
removing the PPP 0x7E flag with more recent versions of the Cisco IOS software. As a result, PPP
frames are not recognized at the L2TP Network Server (LNS) and PPP sessions are not coming up.
Conditions This symptom is observed on a Cisco 7200 series or Cisco 7400 series router that is
running Cisco IOS Release 12.1 T or Release 12.2 DD.
Workaround Use Cisco IOS Release 12.0 T on the LNS.
•
CSCdv63243
Symptoms A router may reload when global switch commands are configured.
Conditions This symptom is observed on a Cisco 3600 series that is running Cisco IOS
Release 12.2(5.8).
Workaround There is no workaround.
•
CSCdv65523
Symptoms When an idle timeout request is received from a RADIUS server when a call is made, the
idle timeout is not reset to the static configuration for asynchronous interfaces after the call is
disconnected.
Conditions This symptom is observed on a Cisco AS5400 that is running Cisco IOS Release
12.1(5)XM3.
Workaround There is no workaround.
•
CSCdv66688
Symptoms Virtual Private Dialup Network (VPDN) calls may not start after the
authen-before-forward command is configured.
Conditions This symptom is observed on a Cisco AS5400 universal access server that is running an
image based on Cisco IOS Release 12.2(2)XA.
Workaround There is no workaround.
•
CSCdv72301
Symptoms The redirecting number is suppressed if the presentation indicator (PI) in oct3a is
indicated as “restricted”.
Conditions This symptom is observed on a Cisco AS5300 that is running Cisco IOS Release 12.2.
Workaround There is no workaround.
•
CSCdv74812
Symptoms Non-Facility Associated Signaling (NFAS) failover recovery on the primary DMS-100
switch may cause the backup D channel to remain in the maintenance busy state after a failure of
the LIF_StartTimer.
Conditions This symptom is observed on a Cisco router that is running Cisco IOS Release 12.2(3)PI.
Workaround There is no workaround.
•
CSCdv76067
Symptoms Certain PPP commands, such as the ppp authentication interface configuration
command cannot be configured on a virtual template or under a template.
Conditions This symptom is observed on a Cisco 2600 series that is running Cisco IOS Release 12.2
or Release 12.2(6.1)T.
Workaround There is no workaround.
Caveats for Cisco IOS Release 12.2
588
OL-3513-16 Rev. G0
Resolved Caveats—Cisco IOS Release 12.2(7)
•
CSCdv77179
Symptoms Dialer Watch dials continuously even after the primary asynchronous interface is
restored. The Dialer Watch dials persistently in an attempt to bring up the link when the interface
on the other side does not respond.
Conditions This symptom is observed on a Cisco 7100 series that is running Cisco IOS
Release 12.2(4)T.
Workaround There is no workaround.
•
CSCdv78082
Symptoms The B channels will stop working if the shutdown interface configuration command
followed by the no shutdown interface configuration command is entered on the controller trunks
and the controllers. The show isdn nfas group privileged EXEC command can be used to verify the
state of the B channels.
Conditions On a Cisco AS5850 that is running Signaling System 7 (SS7) and that is running Cisco
IOS Release 12.2(2)XB02,
Workaround There is no workaround.
•
CSCdv79944
Symptoms Incoming synchronized 64K V.110 calls are wrongly flagged as Personal Handyphone
Internet Access Forum Standard (PIAFS) calls.
Conditions This symptom is observed on a Cisco 3660 that is running Cisco IOS Release 12.1 XM
or Release 12.2 T.
Workaround There is no workaround.
•
CSCdv80153
Symptoms A memory corruption may be observed on a router.
Conditions This symptom is observed on a Cisco router that is running Cisco IOS Release 12.2 or
Release 12.2 T.
Workaround There is no workaround.
•
CSCdv81925
Symptoms As of Cisco IOS Release 12.0(6.1) and above, setting International Telecommunication
Union Telecommunication Standardization Sector (ITU-T) X.3 parameter 3:128 (Selection of data
forwarding character) provided an unprotected non-standard packet dispatch on the semicolon
character.
In Cisco IOS Releases 12.1(9.5) and 12.2(2.5), a defect fix validated all Cisco supported X.3
parameter values to comply with IUT-T X.3 standards. In particular, only settings 3:0 through 3:127
were allowed. This disallowed selection of dispatch on the semicolon character.
Due to customer dependencies on dispatching on semicolon, the validation check for parameter 3 is
temporarily being suppressed. In a subsequent release, a mechanism will be deployed explicitly
permitting non-standard dispatching of characters by a Cisco specified enabling command. This will
restore validation checking for parameter 3 for standard usage and permit extended non-standard
dispatch characters.
Conditions The conditions that pertain to this caveat are described above.
Workaround There is no workaround.
Caveats for Cisco IOS Release 12.2
OL-3513-16 Rev. G0
589
Resolved Caveats—Cisco IOS Release 12.2(7):
•
CSCdv87976
Symptoms Point-to-Point Protocol over Ethernet (PPPoE) session virtual interfaces may not be
reclaimed properly by the system.
Conditions This symptom is observed under rare circumstances on a Cisco 6400 that is running
Cisco IOS Release 12.2(3.6)B01 or Release 12.2 T.
Workaround There is no workaround.
•
CSCdv88723
Symptoms A memory leak may occur for Signaling System 7 (SS7) Continuity Test (COT)
transponder calls at the egress gateway during stress testing. The egress gateway is a voice-only
system that handles interactive voice response (IVR) calls.
Conditions This symptom is observed on a Cisco AS5800 that is running Cisco IOS
Release 12.1(5)XM06.
Workaround There is no workaround.
•
CSCdv89745
Symptoms On a Cisco 7500 series, if the software keyword is not included in the compress
{predictor | stac [distributed | software]} interface configuration command for a virtual template
that is associated with PPP over a Frame Relay circuit, the compress stac interface configuration is
blocked. When this symptom occurs, PPP software compression for PPP over Frame Relay cannot
be configured.
Conditions This symptom is observed on a Cisco 7500 that is running Cisco IOS Release 12.2(6.4)
or Release 12.1(11.6).
Workaround There is no workaround.
•
CSCdv90564
Symptoms A buffer leak may occur in the small buffer pool of a router:
Public buffer pools:
Small buffers, 104 bytes (total 581, permanent 50, peak 581 @ 00:00:02):
27 in free list (20 min, 150 max allowed)
<----
21644506 hits, 6890 misses, 47 trims, 578 created
205 failures (0 no memory)
Conditions This symptom is observed on a Cisco router that is running Cisco IOS Release 12.2(5.4)
and that is configured for X.25 switching.
Workaround There is no workaround.
•
CSCdw00412
Symptoms A router may reload with a bus error and display the following stack trace message:
Stack trace from system failure: FP: 0x62D0AA90, RA: 0x604A8ED0 FP: 0x62D0AAB0, RA:
0x604A6DAC FP: 0x62D0AAD8, RA: 0x6114BB84 FP: 0x62D0AAF0, RA: 0x61147DD0 FP:
0x62D0AB68, RA: 0x60736064 FP: 0x62D0ABA0, RA: 0x60736928 FP: 0x62D0ABE0, RA:
0x607316A8 FP: 0x62D0ADE0, RA: 0x60731DE8
Conditions This symptom is observed after the debug sanity EXEC command is entered on a Cisco
router that is running Cisco IOS Release 12.1(11).
Workaround There is no workaround.
Caveats for Cisco IOS Release 12.2
590
OL-3513-16 Rev. G0
Resolved Caveats—Cisco IOS Release 12.2(7)
•
CSCdw00924
Symptoms On a PPP multilink bundle that has multiple links, if one of the links departs from the
bundle while data is enqueued for output at the bundle interface, the output mechanism on the bundle
may stall, halting any further output from that bundle. The output queue on the bundle becomes full,
causing packets that are forwarded to that bundle to be dropped and the affected bundle to stop
transmitting packets.
Conditions This symptom is observed on a Cisco router that has a PPP multilink bundle and that is
running Cisco IOS Release 12.1 or Release 12.2.
Workaround There is no workaround.
•
CSCdw01642
Symptoms A Cisco AS5800 may be restarted by a bus error at PC 0x603D2EC4, address 0xC.
Conditions This symptom is observed on a Cisco AS5800 that is running Cisco IOS Release 12.2.
After the fix for this caveat is implemented, the counters on the virtual access interface may show
incorrect values when IP Cisco Express Forwarding (CEF) is enabled and used for Layer 2
Tunneling Protocol (L2TP) sessions on high end routers. Please ensure that the fix for CSCdv57640
is also present in the image if this is an issue.
Workaround There is no workaround.
•
CSCdw02819
Symptoms If the number range of the B channels of the isdn busy dsl number b_channel number
interface configuration command is configured with 31 as the last channel (for example: isdn busy
dsl 0 b-channel 17-31), the command is not written into the configuration.
Conditions This symptom is observed on a Cisco Catalyst 4224 that is running Cisco IOS
Release 12.1(5)YE3.
Workaround There is no workaround.
•
CSCdw07264
Symptoms A Cisco Router Switch Processor (RSP) may reload if the TCP/IP header compression
on an X.25 map is configured and unconfigured several times.
Conditions This symptom is observed on a Cisco RSP that is running Cisco IOS Release 12.2(6).
Workaround There is no workaround.
•
CSCdw08887
When the ring-again feature is used between PBXs that are configured for Q-signaling (QSIG) with
gateways in between, the second setup message (which is signal only) does not pass the correct
information to the far-end PBX and causes the call to fail. There is no workaround.
•
CSCdw11765
Symptoms PPP Link Control Protocol (LCP) is not accepting sent CONFACK that is negotiated on
an asynchronous interface for a virtual profile.
Conditions This symptom is observed on a Cisco router that is running Cisco IOS Release 12.2(6.5).
Workaround There is no workaround.
•
CSCdw12748
Symptoms Frame Relay datastream payload compression for Cisco encapsulated Data-Link
Connection Identifiers (DLCIs) does not work and negotiation fails.
Conditions This symptom is observed on a Cisco router that is running Cisco IOS Release 12.2(6.4)
or Release 12.2(6.1)T.
Caveats for Cisco IOS Release 12.2
OL-3513-16 Rev. G0
591
Resolved Caveats—Cisco IOS Release 12.2(6j):
Workaround There is no workaround.
•
CSCdw14064
A Cisco 3640 router that is running Cisco IOS Release 12.2(6) and has an ISDN interface that is
configured using the isdn protocol-emulate network interface configuration command may reload
with a bus error. There is no workaround.
•
CSCdw26352
A Cisco 1417 router that has a PPP over ATM (PPPoA) configuration that uses a virtual template
interface may experience a wedged input queue on the virtual access interface. This condition may
cause the line to be dropped. There is no workaround.
•
CSCuk30274
A protocol emulate network cannot be configured for the NET 5 switch type. There is no
workaround.
Resolved Caveats—Cisco IOS Release 12.2(6j)
Cisco IOS Release 12.2(6j) is a rebuild release for Cisco IOS Release 12.2(6). The caveats in this
section are resolved in Cisco IOS Release 12.2(6j) but may be open in previous Cisco IOS releases.
•
CSCdz71127
Cisco routers and switches running Cisco IOS software and configured to process Internet Protocol
version 4 (IPv4) packets are vulnerable to a Denial of Service (DoS) attack. A rare sequence of
crafted IPv4 packets sent directly to the device may cause the input interface to stop processing
traffic once the input queue is full. No authentication is required to process the inbound packet.
Processing of IPv4 packets is enabled by default. Devices running only IP version 6 (IPv6) are not
affected. A workaround is available.
Cisco has made software available, free of charge, to correct the problem.
This advisory is available at
http://www.cisco.com/warp/public/707/cisco-sa-20030717-blocked.shtml
•
CSCea02355
Cisco routers and switches running Cisco IOS software and configured to process Internet Protocol
version 4 (IPv4) packets are vulnerable to a Denial of Service (DoS) attack. A rare sequence of
crafted IPv4 packets sent directly to the device may cause the input interface to stop processing
traffic once the input queue is full. No authentication is required to process the inbound packet.
Processing of IPv4 packets is enabled by default. Devices running only IP version 6 (IPv6) are not
affected. A workaround is available.
Cisco has made software available, free of charge, to correct the problem.
This advisory is available at
http://www.cisco.com/warp/public/707/cisco-sa-20030717-blocked.shtml
Caveats for Cisco IOS Release 12.2
592
OL-3513-16 Rev. G0
Resolved Caveats—Cisco IOS Release 12.2(6i)
Resolved Caveats—Cisco IOS Release 12.2(6i)
Cisco IOS Release 12.2(6i) is a rebuild release for Cisco IOS Release 12.2(6). The caveats in this
section are resolved in Cisco IOS Release 12.2(6i) but may be open in previous Cisco IOS releases.
The following information is provided for each caveat:
Symptoms—A description of what is observed when the caveat occurs.
Conditions—The conditions under which the caveat has been known to occur.
Workaround—Solutions, if available, to counteract the caveat.
•
CSCdx65232
Symptoms A memory allocation (MALLOC) failure may occur on a router.
Conditions This symptom is observed on a Cisco router when an H.323 call is set up during a fax
load.
Workaround There is no workaround.
•
CSCdx68422
Symptoms A severe memory leak may occur in an H.323 environment after channel- associated
signaling (CAS) Feature Group-B (FGB) voice calls (on 8 T1 lines) are run for a long duration (more
than 20 hours).
Conditions This symptom is observed on a Cisco AS5400.
Workaround There is no workaround.
•
CSCdx77088
Symptoms A software-forced reload may occur on a router, and the following messages may be
displayed:
System was restarted by error - a Software forced crash, PC 0x60396E7C at 4500 Software
(C4500-A3JS-M), Version 12.2(8.1), MAINTENANCE INTERIM SOFTWARE Compiled (current
version) Image text-base: 0x60008948, data-base: 0x61116000 Stack trace from system
failure: FP: 0x618A8458, RA: 0x60396E7C FP: 0x618A8458, RA: 0x603952F4 FP: 0x618A8480,
RA: 0x6039D584 FP: 0x618A84A0, RA: 0x603A0CC8 FP: 0x618A84C0, RA: 0x60398BDC FP:
0x618A8558, RA: 0x6037E1F0 FP: 0x618A85A0, RA: 0x6174B1F0
Conditions This symptom is observed on a Cisco 4500 router that is running Cisco IOS
Release 12.2(8.1).
Workaround There is no workaround.
•
CSCdy35576
Symptoms A Cisco AS5400 universal gateway may reload after memory resources are depleted.
Conditions This symptom is observed on a Cisco router that is running Cisco IOS
Release 12.2(12) when H.323 calls are placed or received under stress conditions.
Workaround There is no workaround.
•
CSCdy68974
Symptoms I/O memory fragmentation occurs with various digital signal processor (DSP) timeout
errors causing alarms to be triggered.
Conditions This symptom is observed on a Cisco AS5300 with Dual Tone Multifrequency (DTMF)
path confirmation enabled.
Workaround There is no workaround.
Caveats for Cisco IOS Release 12.2
OL-3513-16 Rev. G0
593
Resolved Caveats—Cisco IOS Release 12.2(6h):
Resolved Caveats—Cisco IOS Release 12.2(6h)
Cisco IOS Release 12.2(6h) is a rebuild release for Cisco IOS Release 12.2(6). The caveats in this section
are resolved in Cisco IOS Release 12.2(6h) but may be open in previous Cisco IOS releases.
The following information is provided for each caveat:
Symptoms—A description of what is observed when the caveat occurs.
Conditions—The conditions under which the caveat has been known to occur.
Workaround—Solutions, if available, to counteract the caveat.
•
CSCdx19436
Symptoms Overlap calls may fail under certain circumstances.
Conditions This symptom occurs if the ISDN overlap-receiving timer (T302) expires during a call.
When this symptom occurs, the ISDN stack will send an empty info message to the application and
set the info_complete flag to “true”. The call is then rejected even though an outgoing dial peer is
available to route the call using the called number in the setup or in any subsequent info digits.
Workaround There is no workaround.
•
CSCdx37937
Symptoms Advice of charge (AOC) ISDN messages are terminated on a voice-enabled gateway.
Conditions This symptom is observed on a Cisco gateway that has voice enabled and that is running
Cisco IOS Release 12.2(6a).
Workaround There is no workaround.
•
CSCdy16847
Symptoms The Advice of Charge at the end of the call (AOC-E) facility information element (IE) is
not passed across Voice over IP (VoIP) links if the AOC-E facility IE is received as part of an ISDN
release message.
Conditions This symptom is observed on a Cisco router that is running Cisco IOS Release 12.2(6a).
Workaround There is no workaround.
•
CSCdy17772
Symptoms A Voice over IP (VoIP) connection does not pass the Advice of Charge at the end of the
call (AOC-E) facility information element (IE) transparently when the AOC-E facility IE is included
with a progress indicator in the DISCONNECT message.
Conditions This symptom is observed when the progress indicator IE and a facility IE are part of a
DISCONNECT message.
Workaround There is no workaround.
•
CSCdy18949
Symptoms An ISDN BRI interface does not use the T302 timer as an interdigit timer.
Conditions This symptom is observed only with voice calls on an ISDN BRI interface that is
configured for overlap receiving on a Cisco router that is running Cisco IOS Release 12.2(6e). This
symptom does not affect modem or data calls. The inbound dial peer for the voice call does not have
the direct-inward-dial string dial-peer configuration command configured.
Workaround There is no workaround.
Caveats for Cisco IOS Release 12.2
594
OL-3513-16 Rev. G0
Resolved Caveats—Cisco IOS Release 12.2(6g)
•
CSCuk36585
Symptoms A gateway that has an ISDN PRI interface does not use T301 as an interdigit timer.
Conditions This symptom is observed on an ISDN PRI interface on a Cisco gateway that is running
Cisco IOS Release 12.2(6g) and that is configured for overlap receiving.
Workaround There is no workaround.
Resolved Caveats—Cisco IOS Release 12.2(6g)
Cisco IOS Release 12.2(6g) is a rebuild release for Cisco IOS Release 12.2(6). The caveats in this section
are resolved in Cisco IOS Release 12.2(6g) but may be open in previous Cisco IOS releases.
The following information is provided for each caveat:
Symptoms—A description of what is observed when the caveat occurs.
Conditions—The conditions under which the caveat has been known to occur.
Workaround—Solutions, if available, to counteract the caveat.
•
CSCdx76632
Symptoms A Cisco AS5300 that is functioning as a voice gateway may reload because of an
incoming bus error exception.
Conditions This symptom is observed on a Cisco AS5300 that is running Cisco IOS
Release 12.2(6d).
Workaround There is no workaround.
•
CSCdw16903
Symptoms When routing traffic is sent between PRI/ISDN and H.323 Voice over IP (VoIP) network
legs, a memory leak may occur and the router may reload.
Conditions This symptom is observed on a Cisco router that is running Cisco IOS Release 12.2(7)
or an earlier release, and occurs when the router is handling the passthrough Q Signaling (QSIG)
messages from an ISDN call leg through a VoIP network. The memory leakage occurs when H.225
connection timeouts are experienced on the VoIP call legs. If this condition is occurring, a positive
value is displayed for the “H.225 establish timeout” statistic when the show h323 gateway h225
privileged EXEC command is issued. This leak will not occur when normal voice call traffic is
handled.
The number of timeouts can be reduced and the memory leak can be minimized by increasing the
H.323 connection timeout value. The H.323 connection timeout value can be adjusted by issuing the
voice class h323 tag global configuration command. The adjusted value must subsequently be
associated with the voice dial peers. The default value is 15 seconds and can be increased to a
maximum of 30 seconds.
Workaround There is no workaround.
•
CSCdw37839
Symptoms A Cisco AS5400 does not send a Simple Network Management Protocol (SNMP)
LinkUp trap when the cable of an E1 controller is plugged into the Cisco AS5400, which is incorrect
behavior.
Caveats for Cisco IOS Release 12.2
OL-3513-16 Rev. G0
595
Resolved Caveats—Cisco IOS Release 12.2(6g):
Conditions This symptom is observed on a Cisco AS5400 that is running Cisco IOS
Release 12.2(2)XB1 after the cable of the E1 controller is first unplugged and then plugged in again.
Note that when the cable of the E1 controller is unplugged, the Cisco AS5400 does send an SNMP
LinkDown trap, which is correct behavior.
Workaround There is no workaround.
•
CSCdw39876
Symptoms A Cisco router that is connected to a Cisco Catalyst 5500 switch may reload with a bus
error or enter a constant boot loop. The output from the reload indicates that 802.1q (dot1q) is the
cause of this behavior even though the router is not configured for dot1q trunking. The looping stops
after the Ethernet cable is physically disconnected from the switch.
Conditions This symptom is observed on a Cisco router that is running Cisco IOS Release 12.2(6.7).
Workaround Configure a native VLAN on the trunk and configure all the protocol attributes on the
native VLAN instead of the main interface. The two configurations are equivalent. The advantage
of configuring the VLAN as native is that all packets are received and sent as untagged.
•
CSCdw89164
Symptoms A memory allocation failure (MALLOCFAIL) message is displayed when a cable is
unplugged from the serial interface of a router.
Conditions This symptom is observed on a Cisco 7200 series router when a Cisco IOS release that
contains the fix for CSCdt40038 is used. This symptom affects the PA-4T, PA-8T, PA-H, PA-E3, and
PA-T3 port adapters. The occurrence of this symptom depends on the erroneous bit patterns that are
received from the serial line that is down.
Workaround Bring the line back up to enable the memory usage to return to normal.
•
CSCdx23472
Symptoms Inbound overlap calls to a router may fail.
Conditions This symptom is observed on a Cisco 2600 router that is configured for BRI Q-signaling
(QSIG) and overlap receiving. This symptom occurs only if ISDN SHORT-CALL-REFERENCE is
configured on the BRI interface. The inbound overlap calls will work if there is an exact matching
dial peer.
Workaround Ensure that there is an exact matching dial peer for inbound overlap calls.
•
CSCdx46031
Symptoms After a call is stopped, the connection identity (conf-id) value is not displayed in the
command output of the debug voip aaa privileged EXEC command.
Conditions This symptom is observed if the debug voip aaa privileged EXEC command is issued
while the gw-accounting aaa global configuration command is enabled.
Workaround To establish matching start and stop accounting routines, use the call ID in the
following accounting start and stop routines:
start_h323_ccapi_accounting(5)
stop_h323_ccapi_accounting(5)
•
CSCdy14424
Symptoms A repeatedly reloading Versatile Interface Processor (VIP) may cause a network outage.
Conditions This symptom is observed when there is a faulty VIP or faulty hardware in the chassis.
Workaround There is no workaround.
Caveats for Cisco IOS Release 12.2
596
OL-3513-16 Rev. G0
Resolved Caveats—Cisco IOS Release 12.2(6f)
Resolved Caveats—Cisco IOS Release 12.2(6f)
Cisco IOS Release 12.2(6f) is a rebuild release for Cisco IOS Release 12.2(6). The caveats in this section
are resolved in Cisco IOS Release 12.2(6f) but may be open in previous Cisco IOS releases.
•
CSCdt26332
A Cisco 2600 series router that is running Cisco IOS Release 12.2 T may reload when ATM
Adaptation Layer Type-5 (AAL5) Transparent Common Channel Signaling (TCCS) is configured.
There is no workaround.
•
CSCdw26306
If the write memory EXEC command is issued simultaneously with the show config privileged
EXEC command or the show running-config EXEC command via two individual Telnet sessions
by two different users, output similar to the following may be displayed:
bGc nx
^@^@^@^A^A^A^@^@^A^@^@^E\^@^@^@^@^@^@^@^@^@^@^^@^@^@^@^@^@^@^A^@^@^@^@^@^@^@^@^@^@^
@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^
This symptom is observed on a Cisco 7500 router that is running Cisco IOS Release 12.1(10)E.
There is no workaround.
•
CSCdw69187
Cisco IOS software may not recognize the online insertion and removal (OIR) of a port adapter, and
OIR events may not be captured. This symptom is observed on a Cisco 7200 or Cisco 7400 router
that has a Network Service Engine-1 (NSE-1) while the Level 3 (L3) Cache Bypass feature is
enabled. The Cisco 7400 has to be reloaded before a new port adapter is recognized.
Workaround: Avoid using the L3 Cache Bypass feature on a Cisco 7200 or Cisco 7400 that has an
NSE-1 if the installation of a port adapter using an OIR procedure is anticipated.
•
CSCdx34255
NVRAM becomes very busy after the write memory EXEC command is entered to store a very
large configuration. A vty session may appear to be active after the TCP session has ended. Neither
the vty session nor the line can be cleared. Memory allocation (MALLOC) failures may occur on
the slave Route Switch Processor (RSP). These symptoms are observed on a router that has master
and slave cards if a very large configuration is stored using the write memory EXEC command on
the master card.
Workaround: Reload the slave RSP using the slave console port.
•
CSCdx59037
A Cisco 3660 router that is running Cisco IOS Release 12.2(6e) or Release 12.2(10.6) and that is
using the busyout monitor feature on the voice port may not be able to bring up the trunk connections
after the Cisco 3660 is reloaded. This symptom occurs when the busyout monitor voice-port
configuration command is entered to trigger permanent virtual circuit (PVC) monitoring for
connections in a Voice over ATM (VoATM) environment.
Workaround: Perform one of the following workarounds:
– Configure both the master and slave routers as master routers. This configuration removes the
need for the answer mode to be configured on either of the routers.
– Enter the shutdown interface configuration command followed by the no shutdown interface
configuration command on the voice port of the router after the router reloads.
Caveats for Cisco IOS Release 12.2
OL-3513-16 Rev. G0
597
Resolved Caveats—Cisco IOS Release 12.2(6e):
•
CSCdx60187
When a permanent virtual circuit (PVC) is configured for an average bandwidth, the actual
bandwidth that is used for that PVC in the transmit direction may not be accurate. This symptom is
observed on a Cisco MC3810 access concentrator that is running Cisco IOS Release 12.2(7b). There
is no workaround.
•
CSCdx70390
The CiscoVoiceAtmDialControlMIB MIB is not available for the Cisco 7200 router. There is no
workaround.
Resolved Caveats—Cisco IOS Release 12.2(6e)
Cisco IOS Release 12.2(6e) is a rebuild release for Cisco IOS Release 12.2(6). The caveats in this section
are resolved in Cisco IOS Release 12.2(6e) but may be open in previous Cisco IOS releases.
•
CSCdv88338
A segmentation violation (SegV) exception may occur on a Cisco 2610 router that is running
Cisco IOS Release 12.2(3). There is no workaround.
•
CSCdw20980
If you perform an online insertion and removal (OIR) of a Versatile Interface Processor (VIP) in a
Cisco 7500 series router or use the Single Line Card Reload (SLCR) feature after a VIP has reloaded
unexpectedly, and if there are static routes defined that use the interfaces on the failed VIP, traffic
that is using those static routes may fail. The static routes include those that are defined within a
Multiprotocol Label Switching (MPLS) Virtual Private Network (VPN) Routing and Forwarding
(VRF) instance.
Workaround: Enter the clear cef linecard slot- number adjacency command on the affected VIP.
•
CSCdw50476
A call is rejected because a display information element (IE) is added to a Q.931 setup packet. When
a call is received from a vendor-specific client, user information that is included in the H.225 call
setup packet is forwarded to a class 5 switch in the form of a Q.931 packet that is filled with display
IE that is converted from the user information. However, the Q.931 standard reads the Q.931 packet
as if it was sent only from the network side to the user side and the class 5 switch rejects the call.
The display IE should not be included in the setup packet when a Cisco AS5300 universal access
server is set as the user side by default. There is no workaround.
•
CSCdw55474
The “%VTSP-3-DSP_TIMEOUT: DSP timeout on event 6:” message may be displayed on the
console when a call is being set up. This symptom is observed on Cisco 2600, 3600, and 7200 series
routers that have a voice digital signal processor (DSP) and that is running Cisco IOS
Release 12.2(6a). The DSP resets automatically but the current call is dropped. There is no
workaround.
•
CSCdw59988
If the busyout forced voice-port configuration command is issued on a channel-associated signaling
(CAS) voice port during an active call, the call is disconnected. No new outgoing calls can be made
even after the no busyout forced voice-port configuration command is issued on the voice port.
When this condition occurs, incoming calls can still be received. Further outgoing calls can be made
after the first incoming call is received.
Caveats for Cisco IOS Release 12.2
598
OL-3513-16 Rev. G0
Resolved Caveats—Cisco IOS Release 12.2(6d)
Workaround: Enter the shutdown interface configuration command followed by the no shutdown
interface configuration command on the CAS T1 controller or the CAS voice port.
•
CSCdx05828
During overlap receiving on a Cisco voice gateway that is running Cisco IOS Release 12.2(6b) or
Release 12.2(9)S, if an information message carries two digits and the call setup message has a
progress indicator (PI) value of three, the voice gateway loses the second digit of the information
message and calls an incorrect number. If the call setup message does not have a PI, all digits are
collected correctly. There is no workaround.
•
CSCdx05883
On a Cisco voice gateway you can modify the progress indicator (PI) value in an alerting message
by using the progress_ind alert enable pi-number command (where the pi-number argument has a
value of 1, 2, or 8) on the outgoing dial peer of the terminating gateway, but it is not possible to strip
off the PI entirely. There is no workaround.
•
CSCdx11366
On a Cisco 7200 router that is running Cisco IOS Release 12.2(8)T, the maximum number of
modular quality of service command-line interface (MQC) policy maps on a Cisco 7200 router is
limited to 256. CSCdv64193 imposed the restriction on the maximum number of policy maps that
can be issued on a router to 256.
Workaround: Use Cisco IOS Release 12.2 T or 12.2(8)T1. In Cisco IOS Release 12.2(8)T1 and 12.2
T, the maximum number of policy maps that can be configured on a platform is based on what a
given platform can support.
Resolved Caveats—Cisco IOS Release 12.2(6d)
Cisco IOS Release 12.2(6d) is a rebuild release for Cisco IOS Release 12.2(6). The caveats in this section
are resolved in Cisco IOS Release 12.2(6d) but may be open in previous Cisco IOS releases.
•
CSCdv75121
If the write memory command is entered on a Cisco router that has a line card and if the line card
reloads while the write memory command is being processed, the master Route Switch Processor
(RSP) may cause the router to pause indefinitely or reload. There is no workaround.
•
CSCdv83875
On a Cisco 7500 series Versatile Interface Processor 4 (VIP4) that is configured with a PA-2FE port
adapter, after you have reloaded the microcode while the router was forwarding traffic, the router
may stop sending traffic. Entering the shutdown command followed by the no shutdown command
solves the condition only temporarily.
Workaround: Reload the microcode while there is no egress traffic on the router.
•
CSCdv84788
A Versatile Interface Processor (VIP) may reload or record spurious access after class maps are
configured for Frame Relay. There is no workaround.
•
CSCdw04194
If the IP maximum transmission unit (MTU) on a point-to-point interface changes while there are
multiple adjacencies (of different link types) on an interface, only one adjacency will have the
correct MTU configured. There is no workaround.
Caveats for Cisco IOS Release 12.2
OL-3513-16 Rev. G0
599
Resolved Caveats—Cisco IOS Release 12.2(6d):
•
CSCdw04669
A Cisco router reloads if the encapsulation is changed from PPP to High-Level Data Link Control
(HDLC) on a Packet over SONET interface that has the mpls traffic-eng autoroute command
enabled and for which the autorouting first has occurred and then has cleared. There is no
workaround.
•
CSCdw20980
When an online insertion and removal (OIR) is performed on a Versatile Interface Processor (VIP)
that is installed on a Cisco 7500 router or when the Single Line Card Reload (SLCR) feature is used,
traffic forwarding issues may occur after the VIP reloads. If the router uses either a static or a
connected route to send traffic out of an interface that is on the failed VIP, forwarding may stop after
an OIR or an SLCR procedure is performed.
Workaround: Issue the clear cef linecard adjacency EXEC command to recover from this
condition.
•
CSCdw29063
A Cisco router may experience a bus error and reload after the clear ip bgp * command is issued at
the console and a large number of routes are imported. There is no workaround.
•
CSCdw31637
Misaligned or spurious memory accesses may be detected on a Versatile Interface Processor (VIP)
at the hqf_get_policymap() process. There is no workaround.
•
CSCdw67214
On a Cisco 7507 router that has a Versatile Interface Processor 2-40 (VIP2-40) that is installed with
a dual-port Fast Ethernet port adapter (PA-2FE-TX) and configured as an Inter-Switch Link (ISL),
IP packets that are larger than 1484 bytes are not passed. There is no workaround.
•
CSCdw71400
An invalid cache adjacency exists on a line card but not on the Route Processor (RP).
Workaround: Issue the clear cef linecard slot-number adjacency EXEC command on the line card.
•
CSCuk30474
A line card may be stuck in an off-for-download state on a Cisco 7500 router or a Cisco 12000 router.
This condition is indicated by the output of the show cef linecard EXEC command. This condition
is caused by an interprocess communication (IPC) error with another line card during the
Forwarding Information Base (FIB) table download process. There is no workaround.
Caveats for Cisco IOS Release 12.2
600
OL-3513-16 Rev. G0
Resolved Caveats—Cisco IOS Release 12.2(6c)M1
Resolved Caveats—Cisco IOS Release 12.2(6c)M1
Cisco IOS Release 12.2(6c)M1 is a rebuild of Cisco IOS Release 12.2(6). All caveats listed in this
section are resolved in Cisco IOS Release 12.2(6c)M1 but may be open in previous Cisco IOS releases.
•
CSCdw55474
When a call is set up, the following console message may appear:
"%VTSP-3-DSP_TIMEOUT: DSP timeout on event 6:"
The digital signal processor (DSP) in question is then automatically reset, but the current call is
dropped. There is no workaround.
Resolved Caveats—Cisco IOS Release 12.2(6c)
Cisco IOS Release 12.2(6c) is a rebuild of Cisco IOS Release 12.2(6). All caveats listed in this section
are resolved in Cisco IOS Release 12.2(6c) but may be open in previous Cisco IOS releases.
•
CSCdv81177
When voice calls are present, a Cisco 7200 router will repeatedly display the following message:
%SYS-3-MGDTIMER: Timer has parent, timer link, timer = 623B6970.
-Process= "CC-API_VCM", ipl= 4, pid= 112:
These messages are harmless and do not affect the call completion or voice quality.
There is no workaround.
•
CSCdw16710
Compression does not occur on a Frame Relay subinterface when using fast switching and IP header
compression after having deleted a header compression instance using the no frame-relay ip rtp
header-compression command.
Workaround: Re-enable header compression on the subinterface with the frame-relay ip rtp
header-compression command.
•
CSCdw27574
Translation rules are limited to 13 digits.
Workaround: Split the translation and configure part on inbound and other part on outbound call leg
(up to 26 characters again).
•
CSCdw65903
An error can occur with management protocol processing. Use the following URL for further
information:
http://www.cisco.com/cgi-bin/bugtool/onebug.pl?bugid=CSCdw65903
Caveats for Cisco IOS Release 12.2
OL-3513-16 Rev. G0
601
Resolved Caveats—Cisco IOS Release 12.2(6b):
Resolved Caveats—Cisco IOS Release 12.2(6b)
Cisco IOS Release 12.2(6b) is a rebuild release for Cisco IOS Release 12.2(6). The caveats in this section
are resolved in Cisco IOS Release 12.2(6b) but may be open in previous Cisco IOS releases.
•
CSCdu52672
With Multiprotocol Label Switching (MPLS) traffic engineering, when a link on a tunnel headend
is protected with Fast Reroute (FRR), 40 to 120 ms of traffic may be lost for traffic with destinations
that go through the tunnel and that are learned using autoroute. The loss of traffic occurs after the
FRR process has taken place. This condition occurs because the prefix is removed from the routing
table after the first Shortest Path First (SPF) trigger is received. The prefix is readded after the SPF
calculation is completed.
Workaround: Implement one of the following workarounds:
– For Cisco IOS images that have the Intermediate System-to-Intermediate System (IS-IS)
backoff algorithm, assign short intervals when using the prc-interval seconds router
configuration command to reduce the delay.
– Use forwarding adjacencies. This will prevent packet lost because the shortest path tree will not
change. (If you run i-shortest path first [SPF], the SPF computation time will be less than 1 ms
regardless of the topology size.) Forwarding agents (FAs) are used to advertise tunnels into the
Interior Gateway Protocol (IGP) using a fixed metric. Therefore all routers in the area will see
the traffic engineering (TE) tunnel as a normal adjacency. If the tunnel changed path from an
SPF perspective, there are no changes and nothing is done on the routing information base
(RIB), Cisco Express Forwarding (CEF) line cards.
•
CSCdu89525
A Cisco router may reload when an Enhanced Interior Gateway Routing Protocol (EIGRP) router is
removed using the no router eigrp command.
Workaround: Do not remove the EIGRP router after it has been configured.
•
CSCdv06458
Under rare circumstances, a Cisco router may reload if the show ip eigrp neighbors EXEC
command is issued repeatedly while Enhanced Interior Gateway Routing Protocol (EIGRP)
adjacencies are coming up. There is no workaround.
•
CSCdv56410
A Cisco router may reload because of a memory leak. This condition occurs when a plain old
telephone service (POTS) dial-peer rotary is configured and when the terminating switch sends a
disconnect with a progress indicator (PI).
Workaround: On routers that are running Cisco IOS Release 12.2(1) or a later release, configure the
voice call convert-discpi-to-prog global configuration command. This command will convert an
inbound ISDN disconnect message with a PI to an H.225 progress message that has the same PI
value.
•
CSCdv69439
On a Cisco router that is running Cisco IOS Release 12.2(5.8)T, an Enhanced Interior Gateway
Routing Protocol (EIGRP) route is not removed from the routing table even if the route does not
exist any longer. There is no workaround.
•
CSCdv72301
The redirecting number is suppressed if the presentation indicator (PI) in oct3a indicates
“restricted”. There is no workaround.
Caveats for Cisco IOS Release 12.2
602
OL-3513-16 Rev. G0
Resolved Caveats—Cisco IOS Release 12.2(6b)
•
CSCdv76445
Under rare circumstances, a Cisco 3660 router that is configured as a voice gateway will not register
to its gatekeeper after the router is reloaded.
Workaround: To cause the gateway to register with the gatekeeper, enter the shutdown interface
configuration command followed by the no shutdown interface configuration command on the Fast
Ethernet interface.
•
CSCdv85419
Under rare circumstances, two Cisco Catalyst 6000 Multilayer Switch Feature Cards (MSFCs) that
are running Cisco IOS Release 12.1(8a)E5 may become stuck in the active state while the two
MSFCs are waiting for a neighboring MSFC to reply to an Enhanced Interior Gateway Routing
Protocol (EIGRP) query. This condition occurs when the MSFCs first receive a query with a worse
metric before receiving a second query with an infinite metric. This condition clears after the two
MSFCs wait through the 3-minute stuck in active (SIA) route timer. There is no workaround.
•
CSCdv90919
When a user configures an ISDN trunk for overlap receiving and sends a setup message with no
called party number in order to obtain a dial tone, the connected PBX allows the calling party to hear
the dial tone but continues to collect digits that are sent over the ISDN link as INFO messages.
If the router has an incoming dial peer that has an exact match to the calling party number, a progress
indicator (PI) value is not returned in the SETUP_ACK message. This behavior prevents the dial
tone from the router from being heard. There is no workaround.
•
CSCdw07967
A Cisco router that has class-based weighted fair queueing (CBWFQ) with Weighted Random Early
Detection (WRED) on Frame Relay virtual circuits (VCs) and Frame Relay IP Real Time Protocol
(RTP) header compression may reload. There is no workaround.
•
CSCdw09507
On a terminating router that is running Cisco IOS Release 12.2(6) and that is configured for ISDN
or Signaling System 7 (SS7), if the router sends an ALERT message without a progress indicator
(PI), a dial tone is heard instead of a ringback tone.
Workaround: Configure the terminating router to always send a PI with the ALERT message. If
CC_PROG_INBAND (PI = 8) is sent in the alert message, a ringback will be received.This can be
accomplished by configuring the progress_ind alert enable 8 dial peer configuration command on
the outgoing plain old telephone service (POTS) dial peer of the terminating router.
•
CSCdw14064
A Cisco 3640 router that is running Cisco IOS Release 12.2(6) and that has an ISDN interface that
is configured using the isdn protocol-emulate network interface configuration command may
reload with a bus error. There is no workaround.
•
CSCdw14262
Cisco Voice over IP (VoIP) gateways that are running a Cisco IOS Release 12.2(1a) IP plus image
may experience a high CPU memory utilization condition at the CCH323_CT process. There is no
workaround.
•
CSCdw16602
Cisco IOS software will release a call after the software receives an ISDN disconnect with
cause=user busy. There is no workaround.
Caveats for Cisco IOS Release 12.2
OL-3513-16 Rev. G0
603
Resolved Caveats—Cisco IOS Release 12.2(6a):
•
CSCdw26331
Calls may receive a “no route to destination” message and an incorrect clearing cause code (instead
of a user busy cause code) when calls are placed to a Foreign Exchange Station (FXS) on a busy
interface. Depending on the equipment that is used, the caller may receive a “number unobtainable”
message or fast busy tones instead of a busy tone when this condition occurs.
Workaround: Add a “huntstop” on the dial peer that is assigned to the FXS interface.
•
CSCdw29011
If a caller who is connected to the BRI port on a Cisco 2600 router calls a busy number (that is
connected via the PRI port of a Cisco AS5300 access server) via an H.323 network using
gatekeepers, the caller who is connected to the Cisco 2600 router will receive a Q.931 Disconnect
message with a Normal Call clearing cause code instead of a user busy cause code from the BRI
port. The caller will also not hear any tones. There is no workaround.
Resolved Caveats—Cisco IOS Release 12.2(6a)
Cisco IOS Release 12.2(6a) is a rebuild release for Cisco IOS Release 12.2(6). The caveats in this section
are resolved in Cisco IOS Release 12.2(6a) but may be open in previous Cisco IOS releases.
•
CSCdv22431
Class-based marking does not work on ATM inverse multiplexing over ATM (IMA) interfaces that
are in the Cisco Express Forwarding (CEF) switching path. This condition was observed in
Cisco IOS Release 12.2(2)T and Release 12.2(3.5)T. There is no workaround.
•
CSCdv48301
A call is made with a debit card application on the plain old telephone service (POTS) side is
disconnected after being established by turning off the phone on the receiving end. The call is later
reconnected by entering the number from the calling phone according to the prompt instructions.
After the call is established for the second time, the phone that is called cannot hear anything from
the calling phone. This condition is observed with Cisco AS5300 and AS5800 universal access
servers. There is no workaround.
•
CSCdv56330
The carrier-delay [seconds] interface configuration command should prevent an interface from
being declared as down before the delay timer expires. This expected behavior does not always
occur.
Workaround: To keep a list of present routes on the routing table, use a static route of null0 and a
higher administrative distance such as ip route 10.10.1.1 255.255.2550 null0 250.
•
CSCdv88497
The TCP dropback feature of a Cisco uBR900 router may cause upstream data packets to be
dropped. This condition can significantly affect the performance of upstream FTP transfers and can
affect other types of TCP upstream data-type traffic. There is no workaround.
Caveats for Cisco IOS Release 12.2
604
OL-3513-16 Rev. G0
Resolved Caveats—Cisco IOS Release 12.2(6)
Resolved Caveats—Cisco IOS Release 12.2(6)
This section describes possibly unexpected behavior by Cisco IOS Release 12.2(6). All the caveats listed
in this section are resolved in Cisco IOS Release 12.2(6). This section describes severity 1 and 2 caveats
and select severity 3 caveats.
Access Server
•
CSCdv08170
On a fully loaded Cisco AS5800 universal access server, “DS-RS flow control has got out of sync”
messages may be displayed when analog calls are cleared using the clear spe EXEC command. This
condition may impact service on the access server. There is no workaround.
Basic System Services
•
CSCdm71775
If you perform a write erase that erases the configuration in NVRAM, the boot variables are not
changed.
Workaround: Change the boot configuration and configuration register, then save the configuration
before erasing NVRAM.
•
CSCdu11749
When a large number of Resource Reservation Protocol (RSVP) sessions are made on a Cisco 3810
router that is running ATM, some of the RSVP reservations and their associated switched virtual
circuits (SVCs) may get torn down. This symptom does not occur when only a single RSVP session
is created. There is no workaround.
•
CSCdu31922
The command output of the show process cpu EXEC command indicates that the CPU on a Cisco
universal broadband router is permanently set at 100 percent. This condition is observed on a Cisco
uBR904 universal broadband router that is running Cisco IOS Releases 12.1(3) through 12.1(8) but
does not appear to impact the performance of the router. There is no workaround.
•
CSCdu36153
The Flash MIB implementation for a High End System (HES) in Cisco IOS software does not
provide correct information for the following objects:
– ciscoFlashCode
– ciscoFlashChipDescr
– ciscoFlashDeviceInitTime
There is no workaround.
•
CSCdu59691
A Cisco 7500 router that is running the rsp-jsv-mz.121-7.E image of Cisco IOS Release 12.1(7)E
may experience a software-forced reload.
Workaround: Disable Cisco Express Forwarding (CEF) on the router.
Caveats for Cisco IOS Release 12.2
OL-3513-16 Rev. G0
605
Resolved Caveats—Cisco IOS Release 12.2(6):
•
CSCdu64618
A Cisco AS5300 universal access server may reload unexpectedly because of a bus error at
PC 0xD0D0D0D, address 0x0, and there is no stack trace available after the show stack command
is entered. There is no workaround.
•
CSCdu68063
PPP authentication is not performed after AAA preauthentication.
Workaround: Enable PPP authentication locally on the network access server (NAS) interface.
•
CSCdu87239
When a very large number of managed chunks is allocated, the chunk manager may cause a router
to unexpectedly reload when those chunks are freed. There is no workaround.
•
CSCdv10848
A router stops responding to the command-line interface (CLI), pauses indefinitely and
subsequently reloads if the POST data has the following attributes:
– is exactly equal to the content-length data
– does not have a “CRLF” at the end
– ends with the “&” character
There is no workaround.
•
CSCdv11755
A Cisco MC3810 multiservice access concentrator or a Cisco IAD2420 series integrated access
device (IAD) may reload when a Voice over IP (VoIP) session initiation protocol (SIP) or VoIP call
goes from a Foreign Exchange Office Loop Start (FXOLS) to a Foreign Exchange Station Loop Start
(FXSLS). There is no workaround.
•
CSCdv15024
Symptoms The unspecified bit rate (UBR) switched virtual circuits (SVCs) call reserved
bandwidth is equal to the peak cell rate (PCR).
Conditions Symptoms appear in affected Cisco IOS software releases.
Workaround There is no workaround.
•
CSCdv17691
A router may reload if the show running-config privileged EXEC command is issued while the
community string in the snmp-server community string global configuration command is set to a
string that is more than 128 characters.
Workaround: Avoid using community names that have more than 128 characters.
•
CSCdv27602
When a Cisco AS5300 router that is running Cisco IOS Release 12.2(3) with Network Access
Server (NAS) is configured with the radius-server attribute 25 include-in-access-req command,
the NAS may not send the radius-server Class attribute 25 in its access-request as expected. There
is no workaround.
Caveats for Cisco IOS Release 12.2
606
OL-3513-16 Rev. G0
Resolved Caveats—Cisco IOS Release 12.2(6)
•
CSCdv35992
A Cisco AS5300 or AS5400 universal access server that is running Cisco IOS Release 12.2(2)XA1
may allocate an extra IP address from the local IP pool during the AAA preauthentication process.
This address is not freed after the user disconnects.
Workaround: To free the IP address, perform one of the following steps:
– Remove the dialer rotary group and encapsulation PPP from the D channel using the following
interface configuration commands:
Router(config-if)# no dialer rotary-group 1
Router(config-if)# no encapsulation ppp
or
– Remove the radius-server attribute 8 include-in-access-req global configuration command
from the configuration.
or
– Reload the router.
•
CSCdv51254
A Versatile Interface Processor (VIP) may reload at the vip_ip_fib_fs process while it is sending
traffic. There is no workaround.
•
CSCdv63230
The if-needed keyword of the aaa authentication ppp default if-needed global configuration
command may not function normally. There is no workaround.
DECnet
•
CSCdu66029
A Cisco 7200 series router that is running Cisco IOS Release 12.2(1a) may reload with a bus error
exception when sending DECnet pings.
Workaround: Disable the clns send-rdpdu interface command on the interface that is reloading
when a ping is sent using the no clns send-rdpdu command.
IBM Connectivity
•
CSCdv16760
Beginning with Cisco IOS Release 12.1(10.1), data-link switching plus (DLSw+) Ethernet
Redundancy functionality is unstable, causing possible router reloads, spurious memory accesses,
and incorrect cache information.
Workaround: Use transparent bridging, rather than Ethernet Redundancy, to connect Ethernet LANs
to DLSw+ without redundancy.
•
CSCdv34678
Cisco IOS Release 12.1(10) software will fail to correctly determine the Fiber Distributed Data
Interface (FDDI) port adapter revision level. FDDI port adapters with revision levels 1.03 to 1.10
and 1.14 and later revisions can process the routing information field (RIF) of source-route bridging
(SRB) frames in hardware. Cisco IOS Release 12.1(10) software may incorrectly read the revision
Caveats for Cisco IOS Release 12.2
OL-3513-16 Rev. G0
607
Resolved Caveats—Cisco IOS Release 12.2(6):
level as 1.1 and begin processing SRB frames in software. This condition impacts performance and
incorrectly reports drops when a frame is dropped after the frame has transversed the source-bridge
ring-group number. There is no workaround.
Interfaces and Bridging
•
CSCds38187
A Cisco Router with a Route Switch Processor 4 (RSP4) may appear to fast-switch multicast traffic
when the inbound interface is configured as a port-channel interface for multicast distributed
switching. The following command output is displayed when the router is configured for distributed
switching:
Router# show interface fa3/0/0 stat
FastEthernet3/0/0
Switching path Pkts In Chars In Pkts Out Chars Out Processor 2972 369408 6945 536775
Route cache 0 0 24402 2781828 Distributed cache 0 0 0 0 Total 2972 369408 31347 3318603
There is no workaround.
•
CSCdt15266
A Cisco 7100 router that is running c7100-jk2o3s-mz.121-5a.E image of Cisco IOS Release
12.1(5a)E may experience spurious memory access when an Ethernet interface is enabled. There is
no workaround.
•
CSCdu18904
A Cisco 7200 router that is running Cisco IOS Release 12.1(6)E may experience memory allocation
errors. The output of the show buffers EXEC command shows a value for Normal buffers that is
higher than normal.
Normal buffers, 512 bytes (total 51788, permanent 2048):
2 in free list (1024 min, 4096 max allowed)
486895337 hits, 6751474 misses, 220923 trims, 270663 created 48760
failures (0 no memory)
There is no workaround.
•
CSCdu25697
A Cisco 7200 series router that is running Cisco IOS Release 12.2(3) with a PA-A3 ATM port
adapter may reload when you enter the no tag-control-protocol vsi slaves 18 command. There is
no workaround.
•
CSCdu39979
Symptoms On the Cisco 7200 series routers and Cisco 7500 series routers, Multiprotocol Label
Switching (MPLS) packets entering 802.1Q Ethernet VLAN sub-interfaces will not be
Cisco express forwarding (CEF) switched. In the Cisco 7500 series routers, distributed CEF
switching also fails.
Conditions The above symptoms occur when an 802.1Q Ethernet VLAN interface is configured for
MPLS switching.
Workaround There is no workaround.
Caveats for Cisco IOS Release 12.2
608
OL-3513-16 Rev. G0
Resolved Caveats—Cisco IOS Release 12.2(6)
•
CSCdv72634
Symptoms One or more of the following messages may be seen on Cisco AS5800 series universal
gateways or Cisco7200 series router:
“DEC21140:FastEthernet0/1/0: Test traffic”
“FastEthernet0/1/0: No VLANs configured on this hwidb” (this message may be seen when
there are no VLAN subinterfaces)
“FastEthernet0/1/0: CEF pre-processing failed But sub-interface identified as
FastEthernet0/1/0.100” (this message may be seen when there are some VLAN
subinterfaces)
Conditions These messages occur on Fast Ethernet interfaces on Cisco AS5800 series universal
gateways and Cisco 7200 series routers when the incoming packet is more than 900 bytes in length.
Workaround There is no workaround.
•
CSCdu74968
A Cisco router that is running Cisco IOS Release 12.1(8a)E1 with a channelized E1 ISDN PRI port
adapter (PA-2CE1) or a channelized T1 ISDN PRI port adapter (PA-2CT1) and that has class-based
fair weighted queueing (CBWFQ) configured may experience a reload. There is no workaround.
•
CSCdv00074
A Cisco 7200 series router that has a PA-A2 ATM port adapter for PPP over Asynchronous (PPPoA)
transfer mode termination may become unstable and generate the continuous flow of
“ti1575_forced” error messages if the debug atm error EXEC command is enabled. A nonzero
value is displayed when the show controller atm EXEC command is entered.
Workaround: Replace the PA-A2 port adapter with a PA-A3 port adapter.
•
CSCdv27019
There is a continuous leak of memory when transparent bridging is configured and when an access
control list (ACL) is applied to an interface. There is no workaround.
•
CSCdv27118
Cisco IOS Release 12.2(3) may not successfully support the Simple Network Management Protocol
(SNMP) Management Information Base (MIB) for fast ethernet subinterfaces in the ifIndex Mib
object. There is no workaround.
•
CSCdv28013
A Cisco Catalyst 6000 switch or a Cisco 7500 series router with a T1/E1 or T3/E3 port adapter may
fail to perform TFTP after a certain number of online insertion and removals (OIRs) are performed
on the Versatile Interface Processor (VIP) or on Flex WAN cards that have T1/E1 or T3/E3 port
adapters installed. There is no workaround.
•
CSCdv31338
A High CPU utilization condition may occur when a Cisco 7206VXR router that is running Cisco
IOS Release 12.1(9) is installed with a PA-A2-4T1C-OC3SM or PA-A2-4T1C-T3ATM port adapter.
In the command output from the show process cpu EXEC command, the uSecs of Net Background
and ATM periodic indicate increasing values.
Workaround: Enter the no shutdown command on the ATM interface.
•
CSCdv41775
A Cisco 3620 series router that is running Cisco IOS Release 12.2(1b) may report alignment errors
when it has source-route bridging (SRB) enabled and display the following error message in the
router log:
Caveats for Cisco IOS Release 12.2
OL-3513-16 Rev. G0
609
Resolved Caveats—Cisco IOS Release 12.2(6):
%ALIGN-3-TRACE: -Traceback= 602C0E24 602C6BC0 60F11AAC 60F61B88 60F61104 6021C030
603FA5E8 603FA98C
There is no workaround.
•
CSCdv77513
A Cisco 7500 series router that is running Cisco IOS Release 12.2 with a Channelized T3 (CT3)
single wide port adapter on a Versatile Interface Processor (VIP2-50 or VIP4-50) may experience a
VIP reload. There is no workaround.
IP Routing Protocols
•
CSCdr37000
A Cisco 7500 router that is running a Cisco IOS Release prior to release 12.2(5.6) with distributed
Cisco Express Forwarding (dCEF) and Network Address Translation (NAT) may fail to transmit
pings that are sent between two routers through the Cisco 7500 router.
Workaround: Use Cisco IOS Release 12.2(5.6) or a later release.
•
CSCds79395
Under rare circumstances, a Cisco 6400 node route processor (NRP) may reload with the following
message:
%SYS-3-BADMAGIC: Corrupt block at 624D0C38 (magic 0D0D0D0D)
This was observed when IP Network Address Translation (NAT) functionality was used. This
problem has been resolved in Cisco IOS Release 12.2(5.4) or a later release.
Workaround: Use Cisco IOS Release 12.2(5.4) or a later release.
•
CSCdu15729
After a Cisco 6400 broadband aggregator is reloaded, the static routes to null0 are not distributed to
the Border Gateway Protocol (BGP) and the routes have to be manually reentered to trigger the
redistribution. There is no workaround.
•
CSCdu45793
A Cisco router propagates the Resource Reservation Protocol (RSVP) path message as a labeled
packet using the Label Distribution Protocol (LDP) learned label. As a result the path message
traverses the LDP Label Switched Path (LSP), and the IP router alert option present in the Path
message is ignored by routers along the LDP LSP until the Path message reaches the router at the
end-point of the LDP LSP. This condition occurs if:
– The router configured for Multiprotocol Label Switching (MPLS) traffic engineering.
– The router is also configured for Label Distribution Protocol (LDP) label distribution.
– The router receives an Resource Reservation Protocol (RSVP) traffic engineering (TE) Path
message for a TE tunnel Label Switched
Path (LSP) and the message has the following properties:
– The RSVP path message includes no Explicit Route object.
– The LSP destination is one for which LDP has learned a label from the destination’s IP routing
next hop and the label learned is neither implicit-null nor explicit-null.
Workaround: Either of the following workarounds will prevent the router from propagating the
RSVP path message as a labeled packet. However, each may have the undesirable effect of causing
traffic that should be labeled with LDP learned labels to be forwarded unlabeled.
Caveats for Cisco IOS Release 12.2
610
OL-3513-16 Rev. G0
Resolved Caveats—Cisco IOS Release 12.2(6)
Workaround 1: Disable LDP on the router by using the no mpls ip global configuration command.
Workaround 2: Disable LDP on router interfaces that may be outgoing interfaces for RSVP TE
tunnel LSPs by using the interface no mpls ip global configuration command for the interfaces in
question.
Workaround 3: Configure the router that is the next hop router for the LSP(s) in question to not
advertise a label for the LSP destination(s) by using the mpls ldp advertise-labels global
configuration command.
•
CSCdu60821
Symptoms The ip host-routing global configuration command is enabled and if routing is disabled,
the networking device will stop all forms of routing and remove static routes that are defined in a
configuration.
Conditions This symptom is observed when the no ip host- routing global configuration command
is issued in configuration terminal mode on a networking device.
Workaround To issue the no ip host-routing global configuration command, first enable the
command using the ip host- routing global configuration command and then disable the command
immediately using the no ip host-routing global configuration command. Do not exit the global
configuration mode before issuing the no ip host-routing global configuration command.
•
CSCdv04283
A Cisco router that is running Cisco IOS Release 12.2(3) may reload unexpectedly with a
software-forced reload when running Enhanced Interior Gateway Routing Protocol (EIGRP). There
is no workaround.
•
CSCdv13170
Symptoms When multicast packets are fast switched, spurious access messages will appear and
cause a high CPU load.
Conditions Fast switching of multicast packets is enabled.
Workaround There is no workaround.
•
CSCdv17722
Symptoms A Cisco router that is running Multiprotocol Label Switching (MPLS) Traffic
Engineering (TE) may reload with a bus error exception in the rsvp_rrr_path_query.
Conditions The failure happens when a Cisco router configured for MPLS TE is under stress.
Memory allocation failures were also seen before the reload. The router must be running Cisco IOS
Release 12.1 T, 12.2 or 12.2 T.
Workaround There is no workaround.
•
CSCdv18044
Symptoms A memory leak of approximately 1KB occurs for individual Multicast Source Discovery
Protocol (MSDP) connection retry intervals. The default is 60 seconds.
Conditions Symptom appears on a Cisco router that is running Cisco IOS Release 12.1(8a)E03
when an MSDP peer with a higher IP address fails.
Workaround Use the MSDP configuration command, ip msdp shutdown
{peer-address|peer-name},
•
to shut down the session to the unreachable peer.
CSCdv21918
A router may reload if NetFlow-data is exported to a multicast address.
Workaround: Do not configure a multicast address; use a unicast address instead.
Caveats for Cisco IOS Release 12.2
OL-3513-16 Rev. G0
611
Resolved Caveats—Cisco IOS Release 12.2(6):
•
CSCdv22980
Symptoms A Cisco router may reload with illegal access to low address.
Conditions A Cisco router configured with Network Address Translation (NAT) may reload with
illegal access to a low address. This condition is triggered by the attempt to allocate memory in the
interrupt path.
Workaround Disable Cisco Express Forwarding (CEF) switching and fast switching.
•
CSCdv25204
After several hours of operation, a Cisco 1750 router that has Network Address Translation (NAT)
and Port Address Translation (PAT) enabled may fail to establish new PAT sessions. New PAT
sessions cannot be established from a single add-pool with overload. This condition does not occur
when a non-overload configuration is used. There is no workaround.
•
CSCdv30101
A Cisco 7206VXR router that is running Cisco IOS Release 12.2(5) may experience a
software-forced reload in the “IP NAT Ager” process and a watchdog timeout. There is no
workaround.
•
CSCdv40616
Some type 3 link-state advertisements (LSAs) may be generated with MAX-AGE for a virtual
private network (VPN) Open Shortest Path First (OSPF) network after the corresponding Border
Gateway Protocol (BGP) updates are received for a site that has a backdoor link. The clear ip route
destination gateway privileged EXEC command can be used to force LSA generation. There is no
workaround.
•
CSCdv46892
On a Cisco router that is running Cisco IOS Release 12.0(19)ST, the Border Gateway Protocol
(BGP) does not mark the autonomous system (AS) paths that exceed the limit configured by the bgp
maxas-limit configuration command as invalid. There is no workaround.
ISO CLNS
•
CSCdr09770
Configuring a tunnel bandwidth requirement change to a Multiprotocol Label Switching/traffic
engineering (MPLS/TE) tunnel might cause Intermediate System-to-Intermediate System (IS-IS)
routes that are accessible through that tunnel interface and their corresponding Cisco Express
Forwarding (CEF) entries to be unnecessarily reinstalled when subsequent shortest path calculations
are done.
Workaround: If MPLS/TE announces new tunnel information to IS-IS routes after the bandwidth
change has taken effect, this spurious RIB updates behavior can be cleared. The following are a few
actions that can clear this behavior:
– Configuring an MPLS/TE tunnel metric
– Adding or removing MPLS/TE tunnels to the same tail-end as the tunnel that changed
bandwidth. This can include both the current MPLS/TE tunnel and additional tunnels to the
same tail-end.
Caveats for Cisco IOS Release 12.2
612
OL-3513-16 Rev. G0
Resolved Caveats—Cisco IOS Release 12.2(6)
•
CSCdu76096
After a DECnet neighbor is removed from a network, the neighbor may still be advertised in
Intermediate System-to-Intermediate System (IS-IS), link-state packet (LSP), until the LSP times
out. The new LSP that is generated contains the correct information. This condition is observed in
Cisco IOS Release 12.0(5)T.
Workaround: Enter the clear isis * EXEC command.
•
CSCdu79216
DECnet Phase IV and Phase V translation may not work after an upgrade from Cisco IOS Release
12.0(18) to Release 12.1(9) or 12.2(1b). Packets that arrive at the router are not translated or sent to
the end node but are instead looped into the network until the lifetime expires. There is no
workaround.
Miscellaneous
•
CSCdp75419
When voice compression modules (VCMs) are used on a Cisco 3810 router, voice is not heard at
either end of the connection in rare instances. Subsequent calls may be successful without any
further intervention. There is no workaround.
•
CSCds24749
A bus error in crypto_classify_packet may cause a Cisco 7100 series router to reload. There is no
workaround.
•
CSCds25141
An spatial reuse protocol (SRP) interface on a Cisco UBR7246 router that is running
Cisco IOS Release 12.0(10)SC1 or a later release may not allow IP traffic to pass. When this
condition occurs, the SRP interface will record “input errors” and “ignored” when viewing the
output of the show interface srp x/y command (where x=slot, y=port, example: 1/0).
Workaround: Reload the router. Upon reboot, the SRP interface will allow IP traffic to pass.
•
CSCdt04761
A provider edge (PE) router may reload while it is switching traffic if the Label Distribution
Protocol (LDP) label becomes unavailable.
This condition occurs:
– If the router is functioning as an autonomous system boundary router (ASBR) in a interAS
virtual private network (VPN) environment.
or
– If the router is functioning as a PE router in a Multiprotocol Label Switching (MPLS) VPN
environment.
This condition is triggered when the no mpls ip interface configuration command is entered on the
router or a connected neighbor or if a LDP or Tag Distribution Protocol (TDP) is lost.
This condition affects Cisco IOS Release 12.1(5)T, earlier versions of Cisco IOS Release 12.2 and
12.2 T, and all platforms that support the MPLS VPN PE functionality.
Caveats for Cisco IOS Release 12.2
OL-3513-16 Rev. G0
613
Resolved Caveats—Cisco IOS Release 12.2(6):
•
CSCdt40038
On a Cisco 7200 series router that is running Cisco IOS Release 12.1(5a), a PA-8T synchronous
serial port adapter that is configured with High-Level Data Link Control (HDLC) over leased lines
may have ports 4 to 7 or ports 0 to 4 going in the up or down state without any visible cause.
Workaround: Reload the router.
•
CSCdt44914
During large topology changes, an ATM interface that has tag switching enabled may enter and
remain in the not TDP ready state. This condition can be verified by issuing the show tag tdp
discovery EXEC command. Tag switching is consequently inactive on the interface that has tag
switching enabled. Wait for at least a minute for the Tag Distribution Protocol (TDP) to clean up
active tag virtual circuits (TVCs) on the ATM switch. If the output from the show atm interface
EXEC command indicates that there are existing TVCs, TDP will not become active. There is no
workaround.
•
CSCdt46360
A Cisco 3640 router that is running Cisco IOS Release 12.1(2a) with the c3640-is-mz image and
that has a dual-port high-density voice network module (NM-HDV-2E1, revision 1.1) with an E1
(drop and insert, revision 1.0) card, a digital signal processor (DSP) with Voice over Frame Relay
(VoFR) may pause indefinitely or give a busy signal. Abnormal disconnects cause the telephony call
leg to stay active. You can diagnose this situation in the output of the show isdn {status} and show
voice dsp EXEC commands, and the show call active [brief] privileged EXEC command.
Workaround: Reboot the router.
•
CSCdt60299
Symptoms A Cisco router may reload with the following conditions when traffic shaping is
configured:
System returned to ROM by error - a Software forced crash, PC 0x<hexvalue> at <time
date>
Conditions Symptoms appear when a Cisco router is running Cisco IOS Release 12.1(5)T1 or
12.2(1a). Traffic shaping is configured by enabling the show version EXEC command following the
reload.
Workaround There is no workaround.
•
CSCdt63459
On a Cisco 7513 router that has a Route Switch Processor 4 (RSP4) that is configured with 128 MB
DRAM and that is carrying 110,000 routes, entering the clear cef linecard EXEC command may
cause all available memory to be consumed.
Workaround: Enter the clear ip bgp {*} EXEC command before entering the clear ip cef linecard
EXEC command.
•
CSCdt82257
Traffic shaping is not supported in Parallel Express Forwarding (PXF) on a Network Service
Engine-1 (NSE-1). PXF does not punt the packets as expected.
Workaround: Disable PXF.
•
CSCdt94383
A Cisco 6400 Node Route Processor (NRP) may reload with a bus error when it is configured to use
PPP over ATM (PPPoA). There is no workaround.
Caveats for Cisco IOS Release 12.2
614
OL-3513-16 Rev. G0
Resolved Caveats—Cisco IOS Release 12.2(6)
•
CSCdu00328
A Cisco 7500 series router may stop receiving packets on certain interfaces when you reload a Cisco
6500 series switch that is connected through a port channel. This situation does not occur if you
remove the port channel.
Workaround: Run normal IP between the Cisco 7500 series router and the Cisco 6500 series switch
without the port channel configuration.
•
CSCdu02558
A Cisco AS5800 universal access server that is running Cisco IOS Release 12.1(7) may experience
an I/O memory leak and error trace on the trunk card of ISDN E1 trunks. The memory leak and error
trace appears after approximately a week of use. This problem affects only the ISDN trunk card. The
E1 R2 trunk card is not affected. There is no workaround.
•
CSCdu17109
A Cisco 7204 router with a Network Processing Engine (NPE-200) and a PA-A2-4E1XC-E3ATM
ATM-Circuit Emulation Services (ATM-CES) port adapter that is running Cisco IOS
Release 12.1(5) may display the following error message:
No space for tbdP1: mp->data_block
There is no workaround.
•
CSCdu17280
A Meet Me conference call on a Cisco Catalyst 4000 access gateway module that is configured in
gateway mode for conferencing and transcoding may fail to receive audio in one direction. There is
no workaround.
•
CSCdu18367
A Cisco router that is running Cisco IOS Release 12.2 may encounter packet corruption when
routing packets from IP to Multiprotocol Label Switching (MPLS) when packets that are entering a
Generic Routing Encapsulation (GRE) tunnel require fragmentation. If this condition occurs, the
packets cannot be reassembled at the tunnel tail.
Workaround: Disable tag switching at the tunnel head.
•
CSCdu27780
When an “NI2 Suspend” message is received by a Cisco AS5300 access gateway for an established
egress call on a Cisco SS7 Interconnect for Voice Gateways Solution, the gateway may not send an
“H225 Suspend” message over the Voice over IP (VoIP) leg of the call. This situation may occur if
the call is set up using the H.323 IP network slow start. The established call is not affected and is
torn down properly on receipt of a “Release” or “Disconnect” message. There is no workaround.
•
CSCdu27827
When the cable modem termination system clear ip route * privileged EXEC command is entered,
the cable interface on the cable modem may flap because of a stuck output. There is no workaround.
•
CSCdu30384
A Cisco router running Cisco IOS Release 12.2 with Resource Reservation Protocol (RSVP) finds
that RSVP for call admission control is not working when the message is routed through the Clarent
gatekeeper. There is no workaround.
•
CSCdu33067
A Gigabit Ethernet interface may reset when a large number of subinterfaces are added to it using a
vendor-specific virtual private network (VPN) configuration product or a script.
Workaround: Add fewer subinterfaces at each attempt.
Caveats for Cisco IOS Release 12.2
OL-3513-16 Rev. G0
615
Resolved Caveats—Cisco IOS Release 12.2(6):
•
CSCdu38436
A Cisco 7200 or 7500 router with a PA-A3-8T1IMA port adapter installed and configured for
Inverse Multiplexing over ATM (IMA) may experience clocking problems and link instability
resulting from the fact that the default transmit clock source changes to internal when a link is added
to an IMA group.
This can be seen by using the show controller atm X/Y EXEC command for each T1 interface that
is included in the IMA group. If the txtiming field is 0xA, the link is clocking from Line. If the
txtiming field is 0xE, the link is clocking from Internal.
Customers suffering from T1 links that are part of an IMA group flapping periodically may be
experiencing this problem. If the link is removed from the IMA group or the workaround is applied
and the link still flaps, then the problem is unrelated to this bug.
Workaround: Shutdown each of the ports in the ima group (shutdown). Remove each of the ATM
interfaces from the IMA group (no ima-group 0). Configure the clock source to be line on each
(clock source line). Add the links back to the ima group (ima-group 0) No shut the interfaces (no
shut). If the router is reloaded the links will return to internal clocking and the workaround will have
to be applied again.
•
CSCdu40110
Inter-Switch Link (ISL) switching does not work after Parallel Express Forwarding (PXF) is
enabled. There is no workaround.
•
CSCdu41874
IP security (IPSec) bogus packet implementation may not function as expected in Cisco IOS Release
12.1. In Cisco IOS Release 12.0(7)T, bogus packets are used whenever a router needs to reestablish
an IPSec tunnel and activate the dialer. There is no workaround.
•
CSCdu44335
The Tag Distribution Protocol (TDP) uses TCP port 711 for communication between TDP peers.
This is enabled on a router by default in Cisco IOS Release 12.1. The port becomes active once
tag-switching is enabled on a single interface. The TCP port will remain open even after
tag-switching is disabled on the router, both at the interface level and the global level.
Workaround: Reload the router to close the TCP port.
•
CSCdu47782
Creating new channel-groups or subinterfaces on a PA-A3 port adapter may cause the corruption of
an existing subinterface on the same controller. When this situation occurs, the corrupted
subinterface changes its status to down/down and triggers an “output frozen” condition that results
in “cbus complex” restarts on all Versatile Interface Processors (VIPs). Sometimes it is possible to
bring the corrupted interface back into service by undoing the channel-group change and clearing
the E3 controller. There is no workaround.
•
CSCdu51334
Voice gateways that are running Cisco IOS Release 12.2 T that use the High Density Voice Network
Module (NM-HDV) may experience packet-voice digital signal processors (DSPs) that pause
indefinitely displaying the following error on the console:
%VTSP-3-DSP_TIMEOUT: DSP timeout on event 0x6: DSP ID=0x2: DSP Disc (call mode=0)
00:32:48:
%VTSP-3-DSP_TIMEOUT: DSP timeout on event 0x6: DSP ID=0x1: DSP error stats (call
mode=1652392208), chnl info(1, 9, 0), chnl info(1, 10, 1)
Caveats for Cisco IOS Release 12.2
616
OL-3513-16 Rev. G0
Resolved Caveats—Cisco IOS Release 12.2(6)
This condition is triggered when RTP header-compression (cRTP) is configured on a WAN link
between the gateways. “connection trunk” is configured for voice services, and fast-switching is
enabled on the interface where cRTP is set.
When fast-switched cRTP is configured on a WAN interface, one-way audio occurs shortly after a
call is brought up. Calls that are made to the same trunk and other trunks are affected by the one-way
audio condition. All the DSPs on the NM-HDV pause with the error message shown above. The
trunks may eventually begin to flap.
Workaround: Avoid using fast-switched cRTP on the WAN interfaces. Either discontinue using
cRTP or disable fast-switching on the WAN interface using the no ip route-cache interface
configuration command. Process switched cRTP does not trigger this condition.
•
CSCdu52748
Symptoms The low volume, high priority traffic on a channelized T1/E1 interface experiences very
large (up to 80ms) transient delay.
Conditions he symptom occurs when low priority burst is introduced along with low volume, high
priority traffic.
Workaround There is no workaround.
•
CSCdu56052
The automatic number identification (ANI)/dialed number identification service (DNIS) delimiter
feature does not work correctly for outgoing calls. The configured template to process the
ANI/DNIS delimiter selects the default template instead of the configured template. There is no
workaround.
•
CSCdu57102
A Cisco AS5400 universal access server with multiple Non-Facility Associated Signaling (NFAS)
groups may cause a Cisco gateway router to behave in an indeterminate way and to reload if the first
controller on an NFAS group happens to be non-primary or secondary controller.
Workaround: Configure the Cisco gateway router so that the D-channel span of the RLM/NFAS
group starts on the lowest numbered controller (2/0) and the subsequent bearer spans are on
consecutive controller numbers. Configure the next nfas group on the last 4 controllers.
•
CSCdu58862
A Cisco AS5300 universal access server may fail to respond appropriately when a I-11 signal is
transmitted as the first forward signal. There is no workaround.
•
CSCdu60197
When Call Deflection is used with a vendor-specific device, a user error causes a Call Transfer
message to be sent to a Cisco AS5300 universal access server. This unexpected event may cause the
access server to reload after the call disconnects. There is no workaround.
•
CSCdu64551
A Cisco AS5800 access server running Cisco IOS Release 12.2 may experience memory corruption
due to lapb-ta retransmission. There is no workaround.
•
CSCdu69988
Some modems may pause indefinitely in the VDEV state (0x00002000) and stop accepting calls.
The modems become locked in the VDEV state (0x00002400) if an attempt is made to clear them.
This condition affects only the Cisco AS5300 universal access server. There is no workaround.
Caveats for Cisco IOS Release 12.2
OL-3513-16 Rev. G0
617
Resolved Caveats—Cisco IOS Release 12.2(6):
•
CSCdu70230
A Cisco AS5400 universal access server that is running Cisco IOS Release 12.2(2)XA and has
16 T1 lines may experience data paths that are not connected correctly for time-division
multiplexing (TDM) switched 64K digital data calls. There is no workaround.
•
CSCdu70389
A Cisco 1720 router that is running IP Security (IPSec) of a generic routing encapsulation (GRE)
tunnel that is balanced over two serial links may experience low performance.
Workaround: Use Multilink PPP.
•
CSCdu71109
A Cisco 7100 series router that is using an Integrated Services Adapter (ISA) card to accelerate IP
Security (IPSec) packet transformations through any authentication header (AH) protocol
(ah-sha-hmac or ah-md5-hmac) may experience an ISA microcode failure that causes the router to
unexpectedly reload and display the following message:
ROM: Rebooted by watchdog hard reset
This message may be accompanied or replaced by an ISA heartbeat failure error message. The ISA
microcode failure causes the ISA card to become unstable and exhibit symptoms after the ISA card
starts processing IPSec packets. This problem has been observed during the very first load of ISA
microcode on Cisco7120 and 7140 routers.
Workaround: After the router reloads, enter the microcode reload all command from the router
console to reload the ISA microcode. Entering this command restores the microcode and to the ISA
card and the correct microprocessor image. No symptoms will occur after the microcode reload all
command has been entered.
•
CSCdu71743
A Cisco 2600 router that is running Cisco IOS Release 12.1(5)T9 may reload with a stack trace that
points to the authorization proxy.
Workaround: Disable the authorization proxy feature if possible.
•
CSCdu72571
A Cisco 7206VXR router with a Network Process Engine (NPE-400) and a Gigabit Ethernet port
adapter that is running Cisco IOS Release 12.0(17)S may reload with a bus error at an invalid
address after receiving ALIGN-3-TRACE and FX1000-3-TOOBIG messages. There is no
workaround.
•
CSCdu72587
Multiprotocol Label Switching (MPLS) and Tag switching do not function properly between
Multilink PPP interfaces on Cisco 7500/RSP series routers if distributed Cisco Express Forwarding
(dCEF) switching is enabled on interfaces participating in Tag switching.
Workaround: Do not enable dCEF globally, or disable dCEF on interfaces that are configured for tag
switching by entering the no ip route-cache distributed interface configuration command.
•
CSCdu72637
Packets that should be permitted by an access list are dropped when IP reverse path forwarding
(RPF) is used with an access list. This condition occurs when the ip verify unicast reverse-path
access-list interface configuration command is used with an access list that has the log or log-input
option configured. There is no workaround.
Caveats for Cisco IOS Release 12.2
618
OL-3513-16 Rev. G0
Resolved Caveats—Cisco IOS Release 12.2(6)
•
CSCdu73666
If an outbound access list is applied to an interface that has class-based weighted fair queuing
(CBWFQ) configured through a service-policy ouput policy-name command, outbound traffic is no
longer classified into the correct class-based queues. All traffic shows up against the class-default
queue. When the access list is removed, CBWFQ again classifies traffic into the correct queues.
This condition still occurs if the attached policy map does not have CBWFQ but only policing or
marking features. Also, this condition occurs when Multiprotocol Label Switching (MPLS) is used
along with an access list that has the LOG feature in the outbound direction. The LOG feature in
access lists punts packets to process-level switching from Cisco Express Forwarding (CEF)
switching, which causes this condition.
Workaround: Avoid using MPLS switching if it is not needed. Otherwise, avoid using access lists
with the LOG feature.
•
CSCdu74796
Multiple entries appear in the OLD-CISCO-CHASSIS-MIB.cardTable after use of the busyout
command followed by the no busyout command in voice-port configuration mode. There is no
workaround.
•
CSCdu75147
Symptoms A Cisco gateway may send the Open Settlement Protocol (OSP) OID {0 4 0 1321 1 2} in
the ClearToken field of RAS messages to a gatekeeper.
Conditions This symptom occurs when the security password command is configured on the
gateway.
Workaround There is no workaround.
•
CSCdu76946
A Cisco router that is running Cisco IOS Release 12.2(2)T or 12.2(3.1)T may experience multiple
reloads that are caused by TFIB problems. The reloads only occur if the router has installed with
Dynamic Host Configuration Protocol (DHCP) routes going out on an ATM interface that has
Routed Bridge Encapsulation configured. The condition affects only images that contain the fix for
CSCds75405.
Workaround: Configure the no ip cef table adjacency-prefix override command. This action
disables the fix for CSCds75405.
•
CSCdu77394
When a router initiates the FTP control and data connections, the source address for each connection
is different. This condition does not exist if per-destination load balancing is used. Per-destination
load balancing, however, causes some destinations to receive more traffic than others, which in turn
causes some T1s to drop packets while others are hardly used. The ip ftp source-interface interface
global configuration command affects only the control connection but not the data connection.
Workaround: Enter the no ip ftp passive global configuration command or avoid having FTP servers
initiating connections to the routers.
•
CSCdu79955
The permanent virtual connection (PVC)-to-Virtual LAN (VLAN) bindings are not intact after an
ATM Module (WS-X516X) with a large number of PVC-to-VLAN bindings is reloaded.
Workaround: Copy the startup configuration to the running configuration using the copy
startup-config running-config privileged EXEC command on the ATM module.
Caveats for Cisco IOS Release 12.2
OL-3513-16 Rev. G0
619
Resolved Caveats—Cisco IOS Release 12.2(6):
•
CSCdu80042
A FlexWAN module (WS-X6182-2PA) on a Cisco 6509 switch that is running
Cisco IOS Release 12.1(7s)E may reload because of spurious memory access at the
hqf_cwpa_pak_enqueue_local process. There is no workaround.
•
CSCdu81250
Asynchronous modem calls that are sent over channel associated signaling (CAS) trunks are not
counted by the Call Tracker. There is no workaround.
•
CSCdu81314
This defect occurs when a Dynamic Host Configuration Protocol (DHCP) relay agent receives a
DHCP request from a client on an unnumbered interface numbered to a loopback interface that is
configured with two IP addresses. With smart relay enabled, the relay agent sets the gateway address
to the secondary IP address of the loopback interface and the client obtains an IP address based on
this address. The relay agent adds a host route to the client with the route expiry time set to the lease
time. When the same client sends a DHCPREQUEST for RENEW message and when the server
replies with a DHCPACK message, the relay does not extend the route expiry time with the new
lease time. This behavior causes the relay to automatically delete the route after the initial lease time
expires.
Workaround: Release the address and obtain a new address.
•
CSCdu81513
A Cisco 7200VXR router with either a Network Services Engine (NSE-1) or a Network Process
Engine (NPE-400) may experience processor memory parity errors (PMPEs) when the show
tech-support EXEC command or the show pci controller EXEC command is entered.
Workaround: Avoid using the show tech-support EXEC command or the show pci controller
EXEC command.
•
CSCdu82132
A Cisco 3600 series router that is running Cisco IOS Release 12.2(1a) reloads with a bus error on a
call coming from another gateway after it sends “SETUP” messages on the BRI port and receives
“SETUP_ACK” and “CALL_PROC/w PI=8” messages. There is no workaround
•
CSCdu82259
Symptoms Interoperability problems with third-party routers.
Conditions The Cisco AS5300 access server generates a Service ID (SID) packet with payload type
19 for third party routers that, according to the latest Request for Comments (RFCs), expect payload
type 13 for SID packets.
Workaround Interoperability problems do not occur when a call is between two Cisco gateways
because the domain specific part (DSP) of the receiving
•
CSCdu86853
A Cisco 7500 series router that is running Cisco IOS Release 12.0 S, 12.1, 12.2, or 12.1 E with a
2-port channelized T3 port adapter (PA-MC-2T3+) may report the an incorrect FREEDM version
for the second port. The FREEDM version for the first port is shown correctly, but a version number
of zero (0) is shown as the version number for the second port. There is no workaround.
•
CSCdu87170
IP multicast traffic cannot be sent over a Generic Routing Encapsulation (GRE) tunnel if IP Security
(IPSec) is configured on the tunnel. Other routing protocols may continue to work normally.
Workaround: Remove IP Security (IPSec) configuration from the tunnel or send IP multicast traffic
over a different unencrypted tunnel.
Caveats for Cisco IOS Release 12.2
620
OL-3513-16 Rev. G0
Resolved Caveats—Cisco IOS Release 12.2(6)
•
CSCdu87212
A Cisco uBR7200 universal broadband router that is running Cisco IOS Release 12.1(7.5)EC may
reload with a bus error if either of the following occurs:
– Source verification is enabled
– A large amount of traffic fails the source verification check.
There is no workaround.
•
CSCdu87539
Only the old method of permanent virtual connection (PVC) configuration is available with
half-bridging. The router may fail to detect the loss of a PVC with Operation, Administration, and
Maintenance (OAM) loopback cells, resulting in the ATM subinterface remaining up after the PVC
is down. The PVC and the ATM subinterface must also be brought down when OAM is interrupted.
This condition occurs when half-bridging is used with a Cisco 7500 or a Cisco 12000 Internet router.
There is no workaround.
•
CSCdu87761
A gateway Voice over IP (VoIP) dial peer ignores the plus (+) sign prefix in a destination pattern.
This behavior causes the destination patterns “1234” and “+1234” to be matched interchangeably.
The dial peer logic has to be corrected to accept the plus (+) sign as a valid character. There is no
workaround.
•
CSCdu88651
A Cisco AS5800 universal access server may reload unexpectedly because of a memory corruption
when it is configured to run the Stack Group Bidding Protocol (SGBP) and may off load Multilink
PPP (MLPPP) calls to another server. There is no workaround.
•
CSCdu88730
A Systems Network Architecture switch (SNASwitch) may issue getbuffers for a buffer size that is
larger than the one that exists on the router. This condition causes a traceback and a negative sense
code to be sent to the remote station. There is no workaround.
•
CSCdu89643
An Advanced Integration Modules-virtual private network (AIM-VPN) crypto accelerator may
exhibit a different level of performance when it is handling IP traffic and when it is handling User
Datagram Protocol (UDP) traffic. There is no workaround.
•
CSCdv00081
Symptoms In an R2 to H.323 interworking scenario, disconnect cause codes are not passed correctly
from the R2 side into the H.323 network.
Conditions Basic topology:
phone --- 3640 --- R2 --- 3640-UUT --- voip -->
Place an R2 call into the Cisco 3640 Unit Under Test (UUT) gateway. The call is connected end to
end. Have the calling party release the call by hanging up the phone. The outgoing cause code from
the Cisco 3640 UUT into the VoIP network should be 0x10 (normal call clearing). Instead a cause
code of 0x00 is passed.
Workaround There is no workaround.
Caveats for Cisco IOS Release 12.2
OL-3513-16 Rev. G0
621
Resolved Caveats—Cisco IOS Release 12.2(6):
•
CSCdv01173
The BackPlane Ethernet input queue may become partially or completely filled with interprocess
communications (IPC) system messages that are not in the queue in a redundant configuration that
is running Cisco IOS Release 12.1(5)DC. All incoming packet traffic and IPC messages are dropped
if the Remote File System (RFS) encounters an error.
Workaround: Disable the disk-mirror or EHSA keepalives in the redundancy or main CPU
•
CSCdv03018
The Toolkit Command Language (TCL) App1 process that is running the clid_authen_collect
application may show a 97 percent CPU utilization on calls that use the session initiation protocol
(SIP) if the keywords none, h245-signal, or h245-alphanumeric are used in the dtmf-relay
dial-peer configuration command. Digit collection does not function if the dtmf-relay dial-peer
configuration command is not supported by SIP. There are modified TCL scripts for
clid_authen_collect, clid_authen_col_npw, clid_col_npw_3, and clid_col_npw_npw applications
that automatically disconnect the calls if digit collection is not supported. There is no workaround.
•
CSCdv04016
In a Tunnel Endpoint Discovery (TED) environment with 50 crypto peers of Cisco 7200VXR routers
with the network processing engine (NPE-300), the routers may experience intermittent
software-forced reloads. There is no workaround.
•
CSCdv04703
A Cisco AS5300 router running Cisco IOS Release 12.2 that is routing TCL Interactive Voice
Response (IVR) traffic over a period of weeks may generate system logs indicating that a Tool
Command Language (TCL) application is leaking memory from RTPSPI event buffers:
%SYS-2-MALLOCFAIL: Memory allocation of 23424 bytes failed from 0x60FF9F18, pool
Processor, alignment 0 -Process= "TCL APP", ipl= 3, pid= 132 -Traceback= 6032F0F4
60330CA8 60FF9F20 60FFB6D0 60F13600 6118A3AC 611BC3F0 611BF11C 61186CC0 611875F8
61187890 611BF1F0 60325D04 60325CF0
%SYS-2-MALLOCFAIL: Memory allocation of 23424 bytes failed from 0x60FF9F18, pool
Processor, alignment 0
-Process= "TCL APP", ipl= 3, pid= 132
-Traceback= 6032F0F4 60330CA8 60FF9F20 60FFB8C4 60F14280 6126D8C4 61276E68 6118A398
611BC3F0 611BF11C 61186CC0 611875F8 61187890 611BF1F0 60325D04 60325CF0
%SYS-2-MALLOCFAIL: Memory allocation of 23424 bytes failed from 0x60FF9F18, pool
Processor, alignment 0
-Process= "Voice Player", ipl= 3, pid= 105
-Traceback= 6032F0F4 60330CA8 60FF9F20 60FFB8C4 60F14280 6126D8C4 6126F740 60325D04
60325CF0
%SYS-2-MALLOCFAIL: Memory allocation of 23424 bytes failed from 0x60FF9F18, pool
Processor, alignment 0 -Process= "MGCP Application", ipl= 3, pid= 37 -Traceback=
6032F0F4 60330CA8 60FF9F20 60FFB220 60F1F1D8 60F1F3EC 61134ADC 6113135C 61136618
61128CA8 610F5D5C 610F76D8 60325D04 60325CF0
%SYS-2-MALLOCFAIL: Memory allocation of 23424 bytes failed from 0x60FF9F18, pool
Processor, alignment 0 -Process= "MGCP Application", ipl= 3, pid= 37
Also, when using a show memory summary command, the output under “Processor memory” will
show an extraordinarily high amount of used memory for the TCL APP process:
Router# show memory sum Head Total(b)
Used(b) Free(b) Lowest(b) Largest(b) Processor 61DBA700 103045376 102243504 801872
613384 19680 I/O 40000000 16777216 8762064 8015152 7952324 7952284
Processor memory
Alloc PC Size Blocks Bytes What ...... 0x60FF9F18 23424 3543 82991232 TCL APP
There is no workaround.
Caveats for Cisco IOS Release 12.2
622
OL-3513-16 Rev. G0
Resolved Caveats—Cisco IOS Release 12.2(6)
•
CSCdv04921
Incoming ISDN calls may fail with cause code (unallocated/unassigned number) on a Cisco AS5300
access server that is running Cisco IOS Release 12.2(5). This condition occurs when the inbound
dial peer is configured for DID but there is no corresponding outbound dial peer which matches the
called number. Fax or IVR applications are susceptible to these dial peer configurations.
Workaround: Add an outbound dial peer which matches the called number or remove DID from the
inbound dial peer if that is an option.
•
CSCdv04956
Symptoms A Cisco server that is used as a terminating gateway that is loaded with an ‘is’ or ‘js’
image may experience a memory leak in the CCH.323_CT process under stress and could result in
a restart.
Conditions The leak is present when tunneling H.245 Control Channel messages across the H.225
connection. Tunneling of the H.245 Control Channel is enabled by default, and will occur when the
dialpeer is configured for DTMF Relay or Fax Relay.
Workaround Calls setup using H.323 slowstart procedures will not exhibit the failure. However, this
requires the originating gateway to be configured to initiate slowstart. The default configuration is
faststart.
•
CSCdv05618
After a policy map is attached on an ISDN PRI interface, a Cisco router reloads when the no
policy-map policymap name command is issued. This condition also happens if the no
service-policy output policy-name or the no service-policy input policy-name interface command
is issued.
There is no workaround, but users may use the new dialer profile model for dialing solutions as it
does not have this problem. It is more flexible and works better with QoS features.
•
CSCdv05997
The ISDN DISCONNECT message is sent with a Progress Indicator (PI). There is no workaround.
•
CSCdv06207
A Cisco 7200 router running Cisco IOS Release 12.2(2) may experience a bus error during
configuration of Network-Based Application Recognition and an Access Control List. This occurs
when a stateful session closes at exactly the same time that the system tries to timeout the same flow.
Workaround: Use the ip nbar resources # # # command to extend the time until the system will try
to timeout an unused flow. For example: use of ip nbar resources 600 1000 50 commands the
system to wait 10 minutes (600 seconds) until it tries to clean up a flow. The longer the delay he less
potential there is for a reset packet (RST) or finish (FIN) packet to arrive at the same time.
•
CSCdv06330
In a two router shelf redundancy environment, the OLD-CISCO-CHASSIS-MIB.cardSerial MIB
object is reporting an incorrect value of 0. There is no workaround.
•
CSCdv06717
Symptoms Bearer channels, belonging to controllers (T1 or E1) that do not carry the Active
D-channel, may be wrongly marked “Out of Service.”
Conditions Symptom occurs during PSTN Gateway (PGW) switchovers from Active to Standby.
Workaround There is no workaround.
Caveats for Cisco IOS Release 12.2
OL-3513-16 Rev. G0
623
Resolved Caveats—Cisco IOS Release 12.2(6):
•
CSCdv06837
Symptoms A service policy which can be accepted in a Cisco 7500 series router may suddenly not
be accepted.
Conditions Symptom occurs when the max-reserved-bandwidth interface configuration command
is not accepted in a Cisco 7200 series router although it is accepted in a Cisco 7500 series router.
Workaround There is no workaround.
•
CSCdv07928
Symptoms The ISDN layer2 will not come up after a reload. The following message is seen on the
router console during the reload:
!!!! s:t:c:ts 1:1:15:16 already configured!!!
In addition, the message “tdm voice connect failed” is displayed during boot up or when making
calls.
Conditions The symptom occurs on a Cisco 2600 series router that is running Cisco IOS
Release 12.2 with Voice/WAN Interface Cards (VWIC-2MFT-T1-DI or VWIC-2MFT-E1-DI).
Workaround Power cycle the router or reset time division multiplexing (TDM) switching and reload
the high density voice network modules (NM-HDV) firmware.
•
CSCdv08066
Unsolicited debug messages may appear in the system log when certain error conditions occur while
Voice over IP (VoIP) is used. There is no workaround.
•
CSCdv08627
A phantom entry may appear for a dial shelf controller on a Cisco AS5800 universal access server
in the ENTITY-MIB.physicalTable.
Workaround: Reload the chassis.
•
CSCdv09975
When the no shutdown command is entered after the shutdown command is entered on a circuit
emulation service (CES) card, a burst of bit errors is noticed on the circuit on some other ports on
the same peripheral adapter module (PAM). This condition is observed on the Cisco 8540
multiservice switch router (MSR), the Catalyst LS1010 switch, and the Cisco 7200 series router and
can affect both E1 or T1 interfaces. There is no workaround.
•
CSCdv10359
A Cisco 7200VXR router with a PA-VXC/B+ port adapter may not correctly display clock slips
when the router is operating in the E1 mode. This condition can affect voice and fax calls that are
going through the router. To verify the timing of the router, enter the show frame-clocks EXEC
command.
Workaround: Ensure that the frame-clock-select controller configuration command is configured so
that the E1 controller and the digital signal processors (DSPs) are clocking from the same clock
source.
•
CSCdv10805
A gatekeeper may reload if the show gatekeeper gw-type-prefix EXEC command is entered on the
gatekeeper while there is a large routing table on the gatekeeper. There is no workaround.
Caveats for Cisco IOS Release 12.2
624
OL-3513-16 Rev. G0
Resolved Caveats—Cisco IOS Release 12.2(6)
•
CSCdv11050
A Cisco 7500 series router that has two different types of port adapters on the same Versatile
Interface Processor (VIP) (such as Channelized Tunnel 3 or potent-based interface port adapters)
may reload when both of the port adapters are using the Direct Multilink Point-to-Point Protocol
(DMLP).
Workaround: Disable distributed Cisco Express Forwarding (dCEF) on either of the two bundles.
•
CSCdv11514
Phantom objects may be created in the ENTITY-MIB.physicalTable with the type DS1 and the name
DS-T1 on a Cisco AS5800 universal access server.
Workaround: This condition will clear after the access server is reset.
•
CSCdv11518
After the Tag Distribution Protocol (TDP) flaps on the Label Controlled ATM (LC-ATM) interface,
it takes a long time for the interface to become TDP ready. Entering the show tag-switching tdp
discovery command may indicate that TDP is not ready, and TVCs might still be allocated on the
interface. This can occur under stressful conditions in which cross-connections fail to be
de-allocated on the ATM switching fabric. There is no workaround.
•
CSCdv12211
A Cisco Catalyst 5500 switch that is using an OC-3 ATM LAN Emulation (LANE) module
(WS-X5158) and that is running Cisco IOS Release 12.0(16)W5(21) does not allow the default rate
queue to be configured if both of the special rate queues have already been configured.
The following error message is displayed when an attempt is made to add additional permanent
virtual connections (PVCs):
Not creating vc:xx interface: ATM0 is out of rate queues.
There is no workaround.
•
CSCdv12414
A Cisco 3600 series router running Cisco IOS Release 12.2(3) may find that class-based packet
marking is not working on specific Asynchronous Transfer Mode (ATM) interfaces in the Cisco
Express Forwarding (CEF) switching path. The show policy-map interface global configuration
command indicates zero packets marked on the specified interfaces. There is no workaround.
•
CSCdv12625
A Cisco AS5800 access server that is running Cisco IOS Release 12.2 may drop Link Access
Procedure, Balanced (LAPB) frames larger than 1526 bytes when receiving an X.75/LAPB-TA call.
Workaround: Configure the maximum X.75/LAPB-TA frame size to 1526 bytes or less on the client
ISDN terminal adapter.
•
CSCdv13156
On a Cisco 3640 router that has a configured channel group on a Voice WAN interface card (VWIC)
that resides on a High Density Voice Network Module (NM-HDV), fast-switched packets are not
compressed when Compression Real-Time Protocol (cRTP) or Client-To-Client Protocol is used
with fast switching or Cisco Express Forwarding (CEF) switching on the NM-HDV card. The
remote router is configured with a one Port T1 CSU/DSU WAN interface card (WIC-1DSC-T1).
Both routers are running Cisco IOS Release 12.2(3).
Workaround: Disable fast switching using the no ip route-cache interface configuration command.
Caveats for Cisco IOS Release 12.2
OL-3513-16 Rev. G0
625
Resolved Caveats—Cisco IOS Release 12.2(6):
•
CSCdv13595
IP packets cannot be sent between two routers if the packet sizes are 1466 bytes or greater because
the packets are fragmented. The default maximum transmission unit (MTU) for Channelized T1
(CT1) is 1500 bytes. Packets will go through without being fragmented if the MTU is set to
1540 bytes. There is no workaround.
•
CSCdv13787
On a Cisco 1750 series router that is running Cisco IOS Release 12.2(0a), calls out of an analog
E&M port may intermittently fail, which causes the router to seize the trunk, send digits out, but
then drop the call after a second of waiting. There is no workaround.
•
CSCdv14277
Symptoms Memory leak followed by router reload.
Conditions A Cisco AS5300 access server that is running Cisco IOS Release 12.2(3) with Open
Settlements Protocol (OSP) may experience a memory leak caused by the CCH323_CT process that
causes the router to reload once memory is depleted.
Workaround There is no workaround.
•
CSCdv14842
Symptoms A Cisco router may reload upon boot up.
Conditions Symptom occurs in routers that are running Cisco IOS Release 12.1(10.2) with a Local
Area Network Controller Ethernet (LANCE) installed in slot 1 or slot 2.
Workaround Insert the Ethernet controller in slot 0.
•
CSCdv14935
Under rare circumstances, a Cisco uBR7200 series router that is running the ubr7200-k1ps-m image
of Cisco IOS Release 12.0(15)SC may reload when it attempts to process a NULL time event. There
is no workaround.
•
CSCdv15322
A Cisco voice gateway may reload when the T8 timer (waiting for Continuity Test [COT] message)
expires for a bulk number of calls. When the Cisco SC2200 signaling controller receives Initial
Address Messages (IAMs) with a request to do a COT test, it sends a request to the gateway to
perform a COT test, but the Cisco SC2200 signaling controller does not receive a COT message from
the Ingress side for the calls. This behavior causes the T8 timer to expire on the gateway. This
condition occurs only when the debug cot detail or the debug cot api privileged EXEC commands
are enabled and is observed in Cisco AS5300 series gateways that use the Signaling System 7 (SS7)
interconnect solution. There is no workaround.
•
CSCdv16323
When a call is made on a voice dial peer without a callingNumber (a calling number with a Null
value) and no translation rule is defined, the callingNumber is not translated during a translation.
Because of this behavior, the outbound ISDN SETUP message does not include a Calling Party
Number information element (IE).
However, if a translation rule is defined using the translate-outgoing calling translation-tag global
configuration command, the callingNumber is replaced with the “NULL” string value even if the
translation rule is not matched. Because the Calling Party Number IE is not NULL, the ISDN stack
will include a Calling Party Number IE with a “NULL” digit string.
Workaround: Define a new “NULL” string under the relevant translation rule using the rule
name-tag input-matched-pattern substituted-pattern translation rule configuration command.
Caveats for Cisco IOS Release 12.2
626
OL-3513-16 Rev. G0
Resolved Caveats—Cisco IOS Release 12.2(6)
•
CSCdv16876
In a simple hub and spoke topology with generic routing encapsulation (GRE) and IP Security
(IPSec) running between two peers, traffic fails to pass between the peers if fast switching is enabled
on the tunnel interfaces of the hub router.
Workaround: Enable process switching to allow the traffic between the two spokes to pass without
a problem.
•
CSCdv17923
Symptoms An E1 controller on a PA-VXC-2TE1+, PA-VXB-2TE1+, and PA-MCX-8TE1 may reset
itself once every two to three seconds.
Conditions Symptom occurs in Cisco 7200 series routers that are running Cisco IOS Release 12.2
when their controllers are connected to third-party PBXs. Examples include Digital Private Network
Signaling System (DPNSS) and Channel Associated Signaling (CAS).
Workaround There is no workaround.
•
CSCdv18391
A Cisco 7500 router with an Enhanced ATM port adapter (PA-A3) may issue “invalid memory
allocation (MALLOC) at interrupt level” error messages when the show atm vc [vcd | interface
interface-number] privileged EXEC command is entered. There is no workaround.
•
CSCdv18923
A Cisco 7200 series router running Cisco IOS Release 12.2 configured for Multiprotocol Label
Switching (MPLS) over an Inter-Switch Link (ISL) interface that is passing packets larger than 1496
bytes with the do not fragment (DNF) bit set, encounters packets that will not cross the egress
provider edge (PE) router to the customer edge (CE) router connected interface without
fragmentation. The packet at the egress PE router is seen as having an additional 4 bytes attached to
the packet. Changing the maximum transmission unit (MTU), the IP maximum transmission unit (IP
MTU), or the tag switching maximum transmission unit (TAG MTU) is not an option.
Workaround: The only workaround is to unset the DNF bit on the packets.
•
CSCdv20100
A Cisco AS5800 universal access server that is running Cisco IOS Release 12.1(9) with live traffic
may experience a buffer (processor memory) leak. The following messages are displayed when this
condition occurs:
MET-DST: %SYS-2-MALLOCFAIL: Memory allocation of 6000 bytes failed from 0x6046C234,
pool Processor, alignment 0
MET-DST: %SYS-2-MALLOCFAIL: Memory allocation of 568 bytes failed from 0x60404F00,
pool Processor, alignment 0
MET-DST: %SYS-2-MALLOCFAIL: Memory allocation of 568 bytes failed from 0x60404F00,
pool Processor, alignment 0
There is no workaround.
•
CSCdv20153
A Cisco router running Cisco IOS Release 12.2 as an Asynchronous Transfer Mode (ATM) Label
Edge Router (LER) that is configured as a generic routing encapsulation (GRE) Tunnel source may
find that it is transmitting GRE packets over the tag control VC (0/32) of an ATM tag sub-interface
instead of the Tag Virtual Circuit (TVC) bound to the tunnel destination. If the ATM
Label-Switching Routers (LSRs) do not have a route to the tunnel destination, the GRE packets will
be dropped. There is no workaround.
Caveats for Cisco IOS Release 12.2
OL-3513-16 Rev. G0
627
Resolved Caveats—Cisco IOS Release 12.2(6):
•
CSCdv20566
A Q Signaling (QSIG) protocol facility message on an inbound leg that triggers an H.323 facility
message on the outbound leg may cause a Cisco gateway to reload when an inbound dial peer is
configured using the application default command. There is no workaround.
•
CSCdv20644
A Cisco AS5300 voice gateway running Cisco IOS Release 12.2 may reload unexpectedly when
performing prompt playout using a Tool Command Language (TCL) Interactive Voice Response
(IVR) application. There is no workaround.
•
CSCdv21696
Symptoms Configuring the connection trunk on one side in answer-mode may cause one channel to
remain in pending state if there is voice traffic. This problem does not occur if there is no voice
traffic. If answer-mode is not configured on either side of the connection trunk, other problems
occur.
Conditions Symptom may occur when there is a connection trunk between the Cisco 7507
PA-VSB-2TE1+ and the Cisco 3640 series router.
Workaround Separating the timeslots into different ds0-groups enables the connection trunks to
come up and operate normally. Both sides master and master/slave configurations work well.
•
CSCdv22018
A Cisco router may reload when ATM permanent virtual connection (PVC) bundles are configured.
There is no workaround.
•
CSCdv22097
A bus error might occur on a Cisco 7200 series router that is running Cisco IOS Release 12.2(3.5).
This error might cause the router to reload. The following traceback report is displayed when this
error occurs:
0x613C0A98, address 0xD0D0D21. This bus error yields the following tracebacks:
613C0A98 613BC7DC 613AE790 60485734 60489558 604A9438 60488EE0 604894CC 600EB648
601149C8. The debugged traces state the following processes:
0x613C0A98:crypto_classify_packet(0x613c0830)+0x268
0x613BC7DC:crypto_map_check_encrypt(0x613bc5b0)+0x22c
0x613AE790:crypto_check_output(0x613ae764)+0x2c
0x60485734:ip_feature_fastswitch(0x6048475c)+0xfd8
0x60489558:ip_fastswitch_tunnel_wrapper(0x604894e8)+0x70
0x604A9438:gre_ipip_fastsend(0x604a81dc)+0x125c
0x60488EE0:ip_feature_fastswitch(0x6048475c)+0x4784
0x604894CC:ip_fastswitch_wrapper(0x60489464)+0x68
0x600EB648:i82543_rx_interrupt(0x600e9610)+0x2038
0x601149C8:asio_check_0_tx(0x601149c8)+0x0
Workaround: Configure a static crypto map instead of a dynamic crypto map in the router
configuration.
•
CSCdv22628
Symptoms Router reloads on bootup during bootup.
Conditions Symptom occurs on high-end routers such as the Cisco 7200 series, Cisco 7500 series,
Cisco 12000 series Internet routers, and Cisco 10000 series edge service routers.
Workaround There is no workaround.
•
CSCdv22719
Symptoms A Cisco router may reload when the no crypto engine accelerator configuration
command is used.
Caveats for Cisco IOS Release 12.2
628
OL-3513-16 Rev. G0
Resolved Caveats—Cisco IOS Release 12.2(6)
Conditions This symptom occurs on a Cisco 2600 or 3600 series router that is running Cisco IOS
Release 12.2 with a Virtual Private Network (VPN) accelerator and a data compression advanced
integration module (AIM) or a network module (NM) installed.
Workaround There is no workaround.
•
CSCdv22915
When the Intermediate System-to-Intermediate System (IS-IS) routing protocol is used on Cisco
7500 series routers with Ethernet, Fast Ethernet or Gigabit Ethernet, IS-IS adjacency will time out
on routers that are running Cisco IOS Releases 12.0(18.3)S, 12.1(9.2), 12.2(2.5), or 12.2(3.3)S.
Workaround: Upgrade to Cisco IOS Release 12.0(19.1)S, 12.0(19.1)ST, 12.1(10.4), 12.2(5.2)T,
12.2(5.3)S, or 12.2(5.2)PI to solve the problem.
•
CSCdv23618
A Cisco router that is running Cisco IOS Release 12.2(2)XA1 may experience clipping during the
first one to two seconds of an interactive voice response (IVR) prompt playback.
Workaround: Modify the Tool Command Language (TCL) IVR application script to use a timer in
order to delay the start of the prompt playout after the correct connect verb is issued.
•
CSCdv23890
Symptoms When using a multiple number of T1 network modules (any of NM-1FE1CT1,
NM-1FE2CT1, NM-1FE1CT1-CSU, NM-1FE2CT1-CSU) in a Cisco 3600 series router, some or all
of the network modules may be reported as unknown.
Conditions This can happen only when two or more of the above mentioned T1 network modules
are used in the same router.
Workaround Remove all cards so that only one T1 network module is present in the router.
•
CSCdv23922
When Busyout Monitor is configured under the WAN interface and the WAN link was down and
comes back up, Multiple Frame is not established when the show isdn status global configuration
command is entered. There is no workaround.
•
CSCdv25006
The tx-ring-limit ring-limit ATM VC configuration command does not work when it is used to
configure a multichannel E3 port adapter (PA-MC-E3) for a Cisco 7200 router. There is no
workaround.
•
CSCdv25151
When entering an XTagATM interface, the Label Distribution Protocol (LDP) that is running on that
interface will be flapped. There is no workaround.
•
CSCdv25279
A Signal IE with “Ring Back On” is added to the “ALERTING” message that is received from ISDN
when the message is delivered to H.323. There is no workaround.
•
CSCdv25816
Symptoms Non-recognition of partition.
Conditions A partitioned device on a Cisco router that is running Cisco IOS Release 12.2(5) may
not be recognized after a partition operation.
Workaround There is no workaround.
Caveats for Cisco IOS Release 12.2
OL-3513-16 Rev. G0
629
Resolved Caveats—Cisco IOS Release 12.2(6):
•
CSCdv26031
The T3 controller on a 2-port Channelized T3 (CT3) port adapter does not come up, even if locally
looped, if it is receiving “Loss of Signal” error messages. There is no workaround.
•
CSCdv26990
The fgd-eana ports may pause indefinitely in the FGD_EANA_WAIT_DNIS_DILED state after the
Dialed Number Identification Service (DNIS) state. There is no workaround.
•
CSCdv27354
In a two-stage dialing environment, when a phone user in PSTN is calling to a Cisco 3660 voice
gateway that is configured for interactive voice response (IVR), there is no audio playout for that
IVR call. If the user enters the required digits (account number, PIN, and destination number) in that
condition, the call is established and phone users can talk to each other. There is no workaround.
•
CSCdv27837
Symptoms Remote access (RA) mode certification authority (CA) authentication may fail.
Conditions The symptom occurs when configuring more than one trusted root certification authority
(CA) for Cisco IOS Release 12.2.
Workaround Configure only one trusted root CA.
•
CSCdv28081
Virtual Profile does not function properly with Multiprotocol Label Switching (MPLS). There is no
workaround.
•
CSCdv28740
A Cisco router may lose memory resources when lines are flapping and tag-switching ip is enabled.
This condition is most severe when there are multiple adjacencies to the same peer. There is no
workaround.
•
CSCdv28741
Modem ISDN Channel Aggregation (MICA) technologies firmware that is bundled with Cisco IOS
software on a Cisco 3600 router has to be upgraded from version 2.7.2.0 to version 2.7.3.0.
Refer to the release note for MICA firmware 2.7.3.0 at the following URL:
http://www.cisco.com/univercd/cc/td/doc/product/access/acs_serv/5300/sw_conf/sw_ports/fwpwrn
/mica/mca2730.htm
Workaround: Download the mica-modem-pw.2.7.3.0.bin portware from the MICA modem portware
home page at the following URL:
http://www.cisco.com/pcgi-bin/tablebuild.pl/mica
Transfer the bin file into one of the bin cards on the router. The Cisco IOS software will check the
version of the bin file against the bundled portware and automatically choose the latest version of
the portware.
•
CSCdv29315
If a Traffic Engineering (TE) tunnel is configured between two Provider Edge (PE) routers and Label
Distribution Protocol (LDP)/Tag Distribution Protocol (TDP) is configured in the tunnel, Virtual
Private Network (VPN) connectivity through the two PE routers will not function. There is no
workaround.
•
CSCdv29433
A Cisco 827 router or a Cisco SOHO 77 ADSL router may reload when “setany” commands are used
to set the rtr dhcp global configuration command. There is no workaround.
Caveats for Cisco IOS Release 12.2
630
OL-3513-16 Rev. G0
Resolved Caveats—Cisco IOS Release 12.2(6)
•
CSCdv29965
This caveat entry is introduced to correct the defects associated with the set feature on a Cisco 7500
router that is caused by the fix for CSCdv12414. There is no workaround.
•
CSCdv30352
When pause and rerouting is initiated by a third party (non-Cisco) and when an originating gateway
receives an empty capability set from a terminating gateway, the originating gateway should enter
the transmitter side paused state, stop transmitting on established logical channels, and close all
logical channels that it has previously opened. This process allows an originating endpoint to receive
announcements (such as preconnect call progress announcements) when the announcing entity does
not wish to receive media from the endpoint.
A Cisco voice gateway closes the media channels in both directions instead of just closing them in
one direction. The Cisco voice gateway also opens a bi-directional media stream after exchanging
H.245 messages when the terminating endpoint is expecting only a one-way media stream to send
media on channel that was previously opened.This condition affects all Cisco devices that support
Voice over IP (VoIP) and occurs when the Cisco voice gateway receives an H.323 Empty
Capabilities Set message. There is no workaround.
•
CSCdv30594
A Cisco AS5800 universal access gateway router shelf may reload if a DuoDensity Modem Module
(DMM) feature board is rebooted using the hw-module {slot number | subslot subslot/subcard}
reset EXEC command. There is no workaround.
•
CSCdv30913
When the Hot Standby Router Protocol (HSRP) is running on an interface, a router that is actively
responding to the shared HSRP address does not put the address into the Simple Network
Management Protocol (SNMP) ipAddrTable. There is no workaround.
•
CSCdv31702
A Cisco 7200 router that is running Cisco IOS Release 12.2(5) may reload because of a Bus error
when it is running switched voice in the presence of connectionless Q Signaling (QSIG) Protocol.
This condition occurs when both switched voice and connectionless QSIG are present. This
condition may cause problems with Frame Relay and connectionless QSIG. Since Voice over ATM
runs through the same function, it may also be affected if connectionless QSIG is present. This
condition does not affect Voice over IP (VoIP).
Workaround: Use Cisco IOS Release 12.2(5a).
•
CSCdv32499
In an inter-autonomous system (InterAS) setup, the Tag Forwarding Information Base (TFIB) entry
for the external Border Gateway Protocol (eBGP) virtual private network version 4 (VPNv4)
neighbor on the demilitarized zone (DMZ) link does not get installed in the Multiprotocol Label
Switching (MPLS) forwarding table. This condition will cause a loss of connectivity for VPN traffic
between the two customer edge (CE) routers. There is no workaround.
•
CSCdv32583
A Cisco Gateway GPRS Support Node (GGSN) may reset the counters shown in the show gprs
charging statistic all command after sending closed call detail records (CDRs) to the charging
gateway. This situation occurred with the c7200-g5js-mz 122-3.6 software image. There is no
workaround.
Caveats for Cisco IOS Release 12.2
OL-3513-16 Rev. G0
631
Resolved Caveats—Cisco IOS Release 12.2(6):
•
CSCdv34997
If a Traffic Engineering (TE) tunnel is configured between two Provider Edge (PE) routers, Virtual
Private Network (VPN) connectivity through the two PE routers will not function. All PE to PE
traffic should be normally routed through the tunnel.
Workaround: Run Cisco IOS 12.0(17)ST3 or earlier on the PE router or remove the auto route
announce statement of the tunnel interface and configure a static route through the tunnel.
•
CSCdv35240
When a Simple Network Management Protocol (SNMP) set shutdown command or no shutdown
command is sent to the T1 or T3 controller on a Cisco AS5400 universal access server, a blank
description command is added to the configuration for the controller that received the set command.
The configuration for the controller does not change if the controller already has a description
defined. There is no workaround.
•
CSCdv35725
Under some circumstances, dial-in users will not be able to pass IP traffic. The following
circumstances have been identified to cause the problem to happen:
– A Virtual Profile configuration is active for this user. This means that there must either be a
unconditional “virtual-profile” configuration, or there must be a “virtual-profile if-needed”
configuration and conditions that would trigger virtual profiles to be active must be met (for
example, there must be per-user AAA configuration).
In short, the user must be terminated on a Virtual Access interface because of Virtual Profiles.
Sync-PPP users terminated on the serial interface do not experience this condition, and neither
do users terminated on a Virtual Access interface for other reasons. Multilink PPP users or
V.120/X.75, which also use Virtual Access interfaces, are running fine.
It appears that analog users do not experience this situation, even if they are terminated on a
Virtual Access interface due to Virtual Profile configuration.
– Packets that are forwarded from a third interface (for example, an Ethernet interface) to the
ISDN client are impacted. There is no problem with traffic flowing in the other direction, nor is
there a problem with traffic originated by the router itself.
– Cisco Express Forwarding (CEF) must be configured on the Ethernet interface that is receiving
the packet in question. Configuring no ip cef globally or no ip route-cache cef on the Ethernet
interface resolves the problem.
Traffic that meets the above criteria will be corrupted by the router while being forwarded. There is
no workaround.
•
CSCdv37118
A Cisco router that is running Cisco IOS Release 12.2(3) and that is configured with Multiprotocol
Label Switching (MPLS), Multilink PPP, and Cisco Express Forwarding (CEF) may record spurious
memory accesses and log the following messages:
Router# show log
%ALIGN-3-SPURIOUS: Spurious memory access made at 0x60D8382C reading 0x0
%ALIGN-3-TRACE: -Traceback= 60D8382C 603CC6EC 6035DB70 00000000 00000000 00000000
00000000 00000000 %ALIGN-3-TRACE: -Traceback= 60D8382C 603D111C 6035DB70 00000000
00000000 00000000 00000000 00000000
Router# show align
Alignment data for: RSP Software (RSP-JSV-M), Version 12.2(3), RELEASE SOFTWARE (fc1)
Compiled Wed 18-Jul-01 22:17 by pwade
No alignment data has been recorded.
Total Spurious Accesses 42987261, Recorded 39
Caveats for Cisco IOS Release 12.2
632
OL-3513-16 Rev. G0
Resolved Caveats—Cisco IOS Release 12.2(6)
Address Count Traceback 0 51527 0x60E6EE50 0x603BB440 0x6035DB70 0 63069 0x60E6F544
0x603BB440 0x6035DB70 0 29961 0x60E6F544 0x603C9A78 0x6035DB70 0 60000 0x60E6F544
0x603C01D0 0x6035DB70 0 62938 0x60E6F544 0x603C4CE4 0x6035DB70 [ etc ... ]
The effect on the router is poor performance and high CPU utilization, even when there is little
traffic. There is no workaround.
•
CSCdv37414
A Cisco 7200 router that is running Cisco IOS Release 12.2(3) may experience packet loss if Cisco
Express Forwarding (CEF) is configured over an Inter-Switch Link (ISL) trunk configured that is
configured on a PA-2FE-FX Two-Port Fast Ethernet port adaptor. There is no workaround.
•
CSCdv37872
A Cisco Voice over IP (VoIP) gateway with the interactive voice response (IVR) application
configured as the incoming dial peer application may fail to process signal-only calls, trunk
connection calls, and continuity test calls (COTs).
Workaround: Configure the default application on the incoming dial peer.
•
CSCdv38016
A Cisco 3660 router that has both a 2 10/100 Ethernet 2-WAN-card-slot network module
(NM-2FE2W) and a High Density Voice Network Module (NM-HDV) that is running
Cisco IOS Release 12.2(5.5)T may fail to initialize the digital signal processors (DSPs). Calls
without audio are another indication that this condition is occurring. This condition can be verified
by choosing the “Query dsp resource and status” (option 1) of the test dsp command.
Workaround: Move the NM-2FE2W module to a higher slot number than the NM-HDV module, or
use Cisco IOS Release 12.2(3.4)T instead of Cisco IOS Release 12.2(3.5)T.
•
CSCdv39873
Symptoms n rare cases, using the debug h225 asn1 privileged EXEC command can cause the
gatekeeper to reload.
Conditions The reload is related to registration request (RRQ) and registration confirmation (RCF)
debug output, when a print buffer was overflowed.
Workaround Do not use the debug h225 asn1 privileged EXEC command.
•
CSCdv40079
A Cisco router with an Integrated Services Adapter (ISA) card that is running
Cisco IOS Release 12.2(3) and sending traffic at a rate that is higher than 60 Mbps may experience
an ISA card heartbeat failure. Crypto process switching may switch from hardware-to-software
based processing after this failure occurs. The following error message is observed when this
condition occurs:
00:51:51: IPSECcard: an error coming back 1003 ISA Slot-2 MIPS Internal Error: bits
0x04000000, code 0x00000000 ISA slot 2: Firmware heartbeat failure detected
Workaround: Use Cisco IOS Release 12.1(9)E or an earlier release, configure the router to send
traffic at a rate below 60 Mbps, or configure the router to use a software-based crypto process.
•
CSCdv40551
A Cisco Residential Gateway (RGW) gives a 200 response code for a notification request (RQNT)
with Session Description Protocol (SDP). There is no workaround.
•
CSCdv40707
The current implementation of Cisco IOS software is not fully compliant with RFC 2547bis. RFC
2547bis describes the procedures that must be implemented to specific extended communities when
route attributes are passed from a customer edge (CE) router to a provider edge (PE) router. This
Caveats for Cisco IOS Release 12.2
OL-3513-16 Rev. G0
633
Resolved Caveats—Cisco IOS Release 12.2(6):
DDTS enforces those procedures. The CE router may suggest a particular route target for each route
from the route targets that the PE router is authorized to attach to the route. The PE router would
then attach only the suggested route target rather than the full set. This situation gives the CE
administrator some dynamic control of the distribution of routes from the CE.
With the current Cisco IOS software, the PE router allows the CE router to attach route targets in an
update without verifying that they are a subset of route targets to which the virtual routing and
forwarding instance (VRF) attaches. This condition causes the routes to end up in a VRF instance
when they are not supposed to.
Workaround: Configure the VRF route map on the PE router to overwrite the extended community
attribute to avoid the leakage of routes to other VRFs.
•
CSCdv40953
The encryption process may not work on a Cisco 2600 or 3600 router that is running Cisco IOS
Release 12.2 if IP Security (IPSec) and a hardware virtual private network (VPN) card are enabled.
Workaround: Disable the hardware encryption card.
•
CSCdv42884
Link Access Procedure Balanced (LAPB) retransmissions do not work properly on a Cisco AS5850
universal access server. The fix that is implemented by CSCdu64551 does not address the
Cisco AS5850. There is no workaround.
•
CSCdv43578
When a router has the system time set to a time zone other than Greenwich Mean Time (GMT), the
date header in Session Initiation Protocol (SIP) messages will show an incorrect time stamp.
Workaround: To ensure that the correct time stamps are entered into SIP messages, set the system
time on the router to the GMT time zone.
•
CSCdv43694
Distributed Multilink PPP (DMLPPP) and Versatile Interface Processor (VIP) local switching may
not work properly on a 2-port channelized T3 port adapter. There is no workaround.
•
CSCdv45770
After running for a some short period of time, hairpinned calls and normal voice calls may be
dropped on Cisco Voice Gateways. Over time, software resources will be lost and no new calls will
be accepted. This condition occurs if the idsn bchan-negotiate resend-setup command is
configured on Cisco IOS releases containing the fix for CSCdv30465.
Workaround: Do not enable the isdn bchan-negotiate resend-setup command.
•
CSCdv46107
On a PPP over Ethernet (PPPoE) connection, incorrect output packet and byte count information is
generated in the RADIUS accounting record from a Cisco uBR7246 universal broadband router.
Workaround: Enable fast switching or Cisco Express Forwarding (CEF) switching for outbound
packets on the PPPoE session.
•
CSCdv46280
A Cisco Catalyst 6000 SP (Supervisor) switch that is running Cisco IOS Release 12.1(7)E may
reload with a bus error. After the SP reloads with a bus error, the Route Processor (RP) is
automatically reloaded by the SP. There is no workaround.
Caveats for Cisco IOS Release 12.2
634
OL-3513-16 Rev. G0
Resolved Caveats—Cisco IOS Release 12.2(6)
•
CSCdv46312
A Cisco router may reload when the no tag-switching ip interface configuration command is
configured on an interface that has the tag-switching ip interface configuration command enabled
on its subinterfaces. There is no workaround.
•
CSCdv46423
A Cisco 7500 router that is running Cisco IOS Release 12.0(16)ST and that has Multiprotocol Label
Switching (MPLS) enabled in a virtual private network (VPN) environment may experience
spurious memory access and reload with a bus error. There is no workaround.
•
CSCdv46553
When a policy map that is attached to an interface is removed globally after distributed Cisco
Express Forwarding (dCEF) is disabled, the error message “without dCEF enabled, cannot remove
service-policy” is displayed. If the policy map is subsequently removed, the router may reload if the
show policy interface EXEC command is entered.
Workaround: Enable dCEF and remove the class map and policy map.
•
CSCdv48261
The IOS Firewall Feature set, also known as Cisco Secure Integrated Software, also known as
Context Based Access Control (CBAC), and introduced in IOS version 11.2P, has a vulnerability
that permits traffic normally expected to be denied by the dynamic access control lists.
This vulnerability is documented as Cisco Bug ID CSCdv48261.
No other Cisco product is vulnerable.
There is no workaround.
This advisory is available at http://www.cisco.com/warp/public/707/IOS-cbac-dynacl-pub.shtml
•
CSCdv48652
Symptoms With T1 FXO-loopstart emulation, when T1 detects a ringing signal with length less than
125 ms, it responds. Signals with less than 125 ms should be ignored.
Conditions This symptom occurs on a PBX which may generate false ringing signals with length
less than 125 ms. The false ringing signal should be ignored, but Cisco IOS failed to ignore it.
Workaround There is no workaround.
•
CSCdv50118
The dial peer matching logic does not match the sequence of characters in a destination pattern that
has the plus sign (+) for a regular matching expression.
Workaround: Do not use the plus sign as a regular expression for dial peer matching. For example,
if the matching has to be done for 123+4576, configure multiple dial peers with matching patterns
such as 1234576 or 1231234576 instead.
•
CSCdv51304
In a DSL setup, the Dynamic Host Configuration Protocol (DHCP) Relay Agent Information feature
may fail to remove a previously added “option 82.” This condition causes some clients not to accept
DHCP responses and does not comply with RFC 3046, which says that the Relay Agent Information
option that is echoed by a server must be removed by either the relay agent or the trusted downstream
network element that added it when the relay agent forwards a server-to-client response back to the
client. There is no workaround.
Caveats for Cisco IOS Release 12.2
OL-3513-16 Rev. G0
635
Resolved Caveats—Cisco IOS Release 12.2(6):
•
CSCdv51363
Systems Network Architecture (SNA) Switching Services (SNASw) physical units (PU) may be
stuck in the pending Activate Physical Unit (ACTPU) state. There is no workaround.
•
CSCdv51634
A Cisco router that is running IP Security (IPSec) and configured with dynamic crypto maps may
reload under a heavy load. There is no workaround.
•
CSCdv53218
Modems are marked as “BAD” after analog calls are dropped on a Cisco AS5800 universal access
server using the clear spe EXEC command. There is no workaround.
•
CSCdv55001
A Cisco AS5800 or AS5850 universal access server that is running Cisco IOS Release 12.2(2.3),
Release 12.2(XB), or a later release may experience corruption in data received on a modem
connection when issuing AT commands or when running an EXEC session. There is no workaround.
•
CSCdv55003
A Cisco 7206 router with a Network Processing Engine (NPE-150) that is running Cisco IOS
Release 12.2(5) may reload unexpectedly because of a bus error. This condition is indicated in the
command output of the show version EXEC command:
System returned to ROM by bus error at PC 0x60665188, address 0xDEADC207
This condition is most likely to occur if the following items are configured:
– IP Real-Time Protocol (RTP) with header compression
– Queueing service policy (configured on the multilink interface)
– Weighted Random Early Detect (WRED) (configured in the Quality of Service (QoS)
service-policy)
Workaround: Do not configure the items described above.
•
CSCdv56165
A Cisco AS5800 universal access server router shelf may reload unexpectedly when system
processing engines (SPEs) that are already marked as BAD are cleared using the clear spe [slot |
slot/spe] EXEC command. This condition may impact the service of the router shelf. There is no
workaround.
•
CSCdv57629
In an inter-autonomous system (InterAS) setup, the TFIB entry for the external Border Gateway
Protocol (eBGP) virtual private network version 4 (VPNv4) neighbor on the demilitarized zone
(DMZ) link does not get installed in the Multiprotocol Label Switching (MPLS) forwarding table.
This condition may cause a loss of connectivity for traffic that is sent between two routers that are
connected through the setup. There is no workaround.
•
CSCdv62549
The Multiprotocol Label Switching (MPLS) tags that are associated with a virtual private network
(VPN) (vrf x.y.z.w) and a default route (0.0.0.0) are inconsistent between the main Cisco Express
Forwarding (CEF) table and the distributed CEF (dCEF) table on the outbound Versatile Interface
Processor (VIP) card.
Workaround: To recover from this condition, enter the clear ip route vrf vrf-name EXEC command.
Caveats for Cisco IOS Release 12.2
636
OL-3513-16 Rev. G0
Resolved Caveats—Cisco IOS Release 12.2(6)
•
CSCdv62566
A Cisco uBR7200 universal broadband router that is running Cisco IOS Release 12.1(8)EC, 12.2(3),
or 12.2(5) and that has several cable modem cards installed may lock up and prevent console access.
Workaround: Power-cycle the universal broadband router.
•
CSCdv63719
A NextPort modem card may fail to establish all channel-associated signaling (CAS) calls that are
made after the initial call is established. There is no workaround.
•
CSCdv64020
Traffic that is sent across a large number of interfaces that are setup for IP Security (IPSec)
protection, but no IPSec tunnels are established, can cause a Cisco router that is running Cisco IOS
Release 12.2 to display out of memory errors.
Workaround: Arrange the network topology so that such traffic patterns do not occur.
•
CSCdv69646
In Cisco IOS Release 12.2, new IP Security (IPSec) tunnels are not established under heavy load
conditions with short rekeying timers. There is no workaround.
•
CSCdv69882
When a fax-relay call is connected, a spurious memory access error may occur in the ssaConnect
function. There is no workaround.
•
CSCdv70284
A Cisco router that is running Cisco IOS Release 12.2(5.8) or a later release may not be able to
download a file using FTP. The vty session may pause indefinitely if an attempt is made to download
a file using FTP.
Workaround: Use the copy tftp flash command instead.
•
CSCdv71487
A Cisco router that is configured as an H.323 gatekeeper may reload with a bus exception error
message. This condition occurs when a Location Request (LRQ) timeout happens and can affect the
7200-js image of Cisco IOS Release 12.2(5.8) if the router is used as an H.323 gatekeeper. The
7200-js image of Cisco IOS Release 12.2(5.8) works normally if the router is not configured as an
H.323 gatekeeper. There is no workaround.
•
CSCuk26779
A router may reload after booting up when Cisco Express Forwarding (CEF) version 6 is enabled.
There is no workaround.
•
CSCuk27033
The Hot Standby Router Protocol (HSRP) virtual IP address on a Token Ring interface on a Cisco
Catalyst 5000 Route Switch Module (RSM) cannot be pinged. The RSM also fails to respond to
Address Resolution Protocol (ARP) requests for the active virtual IP address. This condition is
observed on Cisco IOS Release 12.1(5.1) and later releases.
Workaround: Configure the standby use-bia interface configuration command.
•
CSCuk27669
In rare circumstances, entering the show ip cef EXEC command may cause a Cisco router to reload
if load-shared paths change while the command executes. There is no workaround.
Caveats for Cisco IOS Release 12.2
OL-3513-16 Rev. G0
637
Resolved Caveats—Cisco IOS Release 12.2(6):
Novell IPX, XNS, and Apollo Domain
•
CSCdu79176
A Cisco router that is running Cisco IOS Release 12.2(3.3)T may reload if the Internetwork Packet
Exchange-Enhanced Interior Gateway Routing Protocol (IPX-EIGRP) is configured and
unconfigured multiple times. There is no workaround.
TCP/IP Host-Mode Services
•
CSCdt90882
When prompts for Tool Command Language (TCL) and Voice Extensible Markup Language
(VXML) applications are loaded using FTP, FTP does not return the proper size of the prompts.
Workaround: Load the prompts using RAM, TFTP, or HTTP.
•
CSCdu18397
TCP applications such as Data Link Switching Plus (DLSw+) may experiences performance
problem due to continuous TCP retransmission caused by round-trip timeout. The round-trip
timeout value is not adjusted effectively when the retransmissions happens. There is no workaround.
•
CSCdv06334
A Cisco 3660 router that is running the c3660-is-mz.122-2.T image of Cisco IOS Release 12.2(2)T
may perform a large number of alignment corrections that may subsequently cause the router to
pause indefinitely. The router must be reloaded to be restored to normal working condition. There
is no workaround.
VINES
•
CSCdv53120
The first hop Sequenced Routing Update Protocol (SRTP) router will pass only part of a withdrawn
route to its neighbor. Not all routes are withdrawn because not all the updates are received by the
neighbor. There is no workaround.
Wide-Area Networking
•
CSCdm84365
The Hot Standby Router Protocol (HSRP) over Bridge Group Virtual Interface (BVI) configuration
is not supported if the BVI encompasses LAN emulation interfaces. The configuration is valid and
functional only if the BVI encompasses ethernet interfaces. There is no workaround.
•
CSCdt15775
A Cisco 3640 router may run out of I/O memory when running compression over X.25. There is no
workaround.
•
CSCdt70631
Symptoms A Cisco 800 series router may disconnect directory assistance service (104) in Japan.
Caveats for Cisco IOS Release 12.2
638
OL-3513-16 Rev. G0
Resolved Caveats—Cisco IOS Release 12.2(6)
Conditions For Cisco 800 platforms, from Cisco IOS instead of CALL_PROGRESS, an Alert
Message must be sent to the call switching mode (CSM) to stop the timer. This problem is seen only
for Japanese switch types for CSM calls. The symptoms are not related to the command-line
interface (CLI) command. They are related to messages forwarded from Cisco IOS to the CSM
application.
Workaround There is no workaround.
•
CSCdt92929
A Cisco router that is acting as an Always On/Direct ISDN (AODI) server may send out a bad frame.
Cyclic redundancy check (CRC) is computed correctly, but the inside of the frame is corrupted,
causing the remote switch to send a Frame Reject (FRMR) message. There is no workaround.
•
CSCdu00134
For undetermined reasons, a Cisco 7200 series router that is running Cisco IOS Release 12.1 and
that has a PA-A3 port adapter that is running Hot Standby Router Protocol (HSRP) and LAN
Emulation (LANE) resolves a remote MAC address to a network service access point (NSAP)
address with the wrong selector byte through the LAN Emulation Address Resolution Protocol
(LE_ARP) process. Pings fail to reach the IP address of the MAC address and DATA DIRECT
virtual connections (VCs) for both the correct and the incorrect NSAP address of the same remote
LAN Emulation Client (LEC) under a single LANE client on the Cisco 7200 series router.
Workaround: Enter the clear lane le-arp name elan-name command.
•
CSCdu38878
Symptoms When an interface is cleared, the Service Profile Identifier (SPID) is reported on the
Basic Rate Interface (BRI) network module or WAN interface card as invalid. The SPID that is
reported after the interface is cleared is still invalid.
Conditions The symptom occurs when the clear interface bri number EXEC command is used to
clear the interface.
Workaround There is no workaround.
•
CSCdu40615
Some clients may fail to successfully complete IP Control Protocol (IPCP) negotiations when
thousands of PPP sessions are simultaneously reestablished, as is the case when an interface with
many links is recycled. All Layer 2 Tunneling Protocol (L2TP) sessions are established, but some
client virtual access interfaces may not get a negotiated IP address. The missing IP address results
in lost IP connectivity on that link. There is no workaround.
•
CSCdu44402
When the shutdown interface configuration command followed by the no shutdown interface
configuration command is entered on a T1 controller or a Fast Ethernet interface that is installed on
a Cisco gateway that is under a load of voice calls, all calls may begin getting path confirm failures
on the T1 controller 0.
Workaround: Reload the router.
•
CSCdu58967
A Cisco 3640 router that is running Cisco IOS Release 12.2(1) with an ISDN BRI interface does not
respond to incoming Q.931 SETUP messages if both B channels are already allocated. The Q.931
document requires that a user to reject such call by sending RELEASE COMPLETE message with
cause No. 34 (“no circuit/channel available”) unless it is able to proceed with the call. There is no
workaround.
Caveats for Cisco IOS Release 12.2
OL-3513-16 Rev. G0
639
Resolved Caveats—Cisco IOS Release 12.2(6):
•
CSCdu62228
A memory corruption may occur on a Versatile Interface Processor 2 model 50 (VIP2-50) and a
PA-A1-OC3 port adapter when cell mode Multiprotocol Label Switching (MPLS) is performed.
This condition occurs when resources are low for the Tag Virtual Circuits (TVCs) on the interface
on the VIP. There is no workaround.
•
CSCdu63648
A router that is configured for Voice over IP (VoIP) may fail to properly pass “Caller-ID”
information to the end user equipment. There is no workaround.
•
CSCdu68154
A Cisco 7500 router with a route switch processor (RSP) that is running Cisco IOS Release 12.1(8)
may experience a reload. This condition occurs if all line cards are reset when an ISDN backup call
is received from a remote device.The ISDN packets originating from the remote device are
corrupted. The router cannot compensate for the corrupt incoming packets on the B-channel serial
interface of the router, and a reload occurs with the following messages:
%LINEPROTO-5-UPDOWN: Line protocol on Interface = > Serial6/0/0:24, changed state to
up
%ISDN-6-CONNECT: Interface Serial6/0/0:24 is now = > connected to 4036090885 CIHAM_CN4
%CBUS-4-FIXBADTXVC: Detected and fixed bad tx vc = > encap on Serial6/0/0:24, bad vc
65283, fixed vc 24 > -Traceback=3D 60394380 6065A8C8 6065B334 601F2558 601F60DC
6037F864 = > 60382E04 60343968
%RSP-3-BADBUFHDR: freeing MEMD pak, address 0 > -Traceback=3D 60376948 603807AC
602E7700 60375140 60394808 6065A8C8
then
%RSP-2-QAERROR: reused or zero link error, write = > at addr 0180 (QA) >
log 22018040, data EE100000 00000000
%QA-3-DIAG: Failed to enqueue buffer header = > 0xEE10
%QA-3-DIAG: Approximate stack backtrace prior to = > interrupt:
%QA-3-DIAG:=20 > -Traceback=3D 60381C38 60343968
%QA-3-DIAG: Buffer 0xEE10 is element 1 on queue = > 0x21
There is no workaround.
•
CSCdu69323
A Cisco router that is handling a high always-on dynamic ISDN (AODI) load may reload. There is
no workaround.
•
CSCdu74918
When the shutdown interface configuration command is entered followed by the no shutdown
command on a Redundant Link Manager (RLM) Non-Facility Associated Signaling (NFAS) group,
all of the DSLs other than the Digital Subscriber Line (DSL) that is configured as “nfas_d primary”
may remain OUT_OF_SERVICE on the signaling controller.There is no workaround.
•
CSCdu75062
A Cisco router may set up a tunnel even if bidirectional Challenge Handshake Authentication
Protocol (CHAP) authentication is not successful. There is no workaround.
•
CSCdv00943
A PPP over Ethernet (PPPoE) session that is going through a Layer 2 Tunneling Protocol (L2TP)
cannot be brought up on a Cisco 7200 L2TP Access Concentrator (LAC) router that is running the
c7200-js-mz.122-3.4T image of Cisco IOS Release 12.2(3.4)T. There is no workaround.
•
CSCdv03689
Symptoms Cisco routers may reload.
Caveats for Cisco IOS Release 12.2
640
OL-3513-16 Rev. G0
Resolved Caveats—Cisco IOS Release 12.2(6)
Conditions Symptom occurs if a point-to-point protocol (PPP) multilink bundle interface goes down
while data is flowing through it.
Workaround There is no workaround.
•
CSCdv05012
Symptoms A Cisco router using software compression may encounter the following error:
ALIGN-1-FATAL: Illegal access to a low address.
Conditions Symptom occurs if a compression is configured using a virtual template and the
configuration for the virtual template is removed with the no interface virtual template command.
Workaround There is no workaround, but the condition is encountered only when the virtual
template configuration is deleted. The problem will not be encountered if the virtual template
information is modified without deleting the virtual template.
•
CSCdv06104
The router may reload when the PPP Multilink protocol is used with Cisco Express Forwarding
(CEF).
Workaround: Disable CEF.
•
CSCdv06508
A router may reload after an ISDN connection is established. There is no workaround.
•
CSCdv09382
Symptoms A memory leak may occur in the ISDN process for the image:c5300-is-mz.122-3.5 of
Cisco IOS Release 12.2(3.5).
Conditions This condition occurred when an overnight stress test was performed with mixed mode
Signaling System 7 (SS7) data calls and voice calls.
Workaround There is no workaround.
•
CSCdv13762
When running Protocol Translation from X.25 to PPP, TCP, or LAT the wrong hostname will appear
in the output of show x25 vc command and the output of debug aaa accounting command. This
condition was first introduced in Cisco IOS Release 12.1(5.6) and 12.2(0.1). There is no
workaround.
•
CSCdv14228
When a controller for a “nfas_d primary” interface is shut down when Redundant Link Manager
(RLM) is configured on a Non-Facility Associated Signaling (NFAS) group, there is an incorrect
indication that the Layer 2 protocol for the NFAS group has failed. No calls can be made into or out
of the NFAS group even though Layer 2 is still active. There is no workaround.
•
CSCdv14997
A Cisco 3660 router that is running Cisco IOS Release 12.2(1a) may experience a memory leak with
the Integrated Local Management Interface (ILMI) response. There is no workaround.
•
CSCdv16842
Symptoms A router may reload when it is performing heavy IP Control Protocol (IPCP) address
negotiations such as those that occur when an ATM or Frame Relay interface with several hundred
links are brought up simultaneously.
Conditions This symptom is only seen when several hundred IPCP sessions are renegotiated without
a recycle of Link Control Protocol (LCP).
Workaround There is no workaround.
Caveats for Cisco IOS Release 12.2
OL-3513-16 Rev. G0
641
Resolved Caveats—Cisco IOS Release 12.2(6):
•
CSCdv19697
A Cisco 1700 router may experience a memory leak during a stress test if the BRI interface is
configured as Network side. There is no workaround.
•
CSCdv21737
Only six or less Redundant Link Manager (RLM) groups may be configured. There is no
workaround.
•
CSCdv24572
A Cisco router may lose memory when the pri-group [timeslots range] and the no pri-group
controller configuration commands are configured on a T1 or E1 controller. There is no workaround.
•
CSCdv25237
Symptoms A Cisco router may fail to dial after Stack Group Bidding Protocol (SGBP) bid is won.
Conditions Symptom occurs in a large scale dial out (LSDO) configuration.
Workaround There is no workaround.
•
CSCdv25288
A memory alignment error may occur on an ISDN PRI when a forced disconnection is performed
on an ISDN call. There is no workaround.
•
CSCdv27419
The shutdown command is not displayed in the command output of the show running
configuration EXEC command after a shutdown interface configuration command is issued on a
Non-Facility Associated Signaling (NFAS) T3 serial interface. The interface cannot be restored
when a no shutdown interface configuration command is issued. This condition affects only NFAS
T3 serial interfaces.
Workaround: Shutdown the controllers instead of the D channel.
•
CSCdv27982
A Cisco AS5800 universal access server that is running Cisco IOS Release 12.1(5)XM5 may
become confused and report that all B channels are unavailable after voice and modem calls are run
repeatedly.
Workaround: Reload the access server when this condition occurs.
•
CSCdv30465
In a configuration with a Cisco AS5300 Voice Gateway configured as an egress point and Cisco
SC2200 Signaling Controller configured as an ingress point in a Signaling System 7 (SS7)
Interconnect for Voice Gateway solution, the Cisco AS 5300 Voice Gateway may fail to propagate
an alert if the isdn negotiate-bchan resend-setup command is enabled on the Cisco AS5300 Voice
Gateway and the Cisco AS5300 Voice Gateway sends a setup message to the SC2200 Signaling
Controller. The SC2200 Signaling Controller will eventually release the channel with a requested
circuit/channel not available message (cause value 44). The Cisco AS5300 will send another setup
message to the Cisco SC2200 Signaling Controller on the same channel with a new call reference
value. If the Cisco AS5300 Voice Gateway receives an alerting message from the Cisco SC2200
Signaling Controller, the Cisco AS5300 Voice Gateway will not propagate the alerting message back
across the H.323 cloud. The failure to propagate the alerting message may cause the Cisco SC2200
Signaling Controller to disconnect the call with a error-handling (recovery) procedure initiated by
the expired timer (cause value 102). The timer on the on the Cisco SC2200 Signaling Controller will
wait for 10 seconds to receive a progress, alert, or connect message for a call before the call is
disconnected. There is no workaround.
Caveats for Cisco IOS Release 12.2
642
OL-3513-16 Rev. G0
Resolved Caveats—Cisco IOS Release 12.2(6)
•
CSCdv36038
In Cisco IOS Release 12.2 T, Cisco Express Forwarding (CEF) may not function properly with PPP
over L2TP in dial-out environments. There is no workaround.
•
CSCdv39663
Symptoms The Cisco 804 router loses ISDN connectivity intermittently. The call drops, and the
router needs to be either reloaded, power cycled or disconnected from the ISDN cable for a minute
to get ISDN connectivity back up.
Conditions The problem is observed when two Cisco 804 routers were connected to each other using
point-to-point protocol (PPP) multilink.
Workaround There is no workaround.
•
CSCdv39711
A Cisco router that is running Cisco IOS Release 12.2(2) may experience outbound modem call
failures. This condition affects outbound modem calls in Non-Facility Associated Signaling (NFAS)
setup and does not occur if the NFAS setup uses a standard PRI (non-NFAS) in which each DSL
(span) uses its own D channel. There is no workaround.
•
CSCdv39804
A Cisco router that is running Cisco IOS Release 12.2(3) may experience a bus error and display the
following error message:
%ALIGN-1-FATAL: Illegal access to a low address, addr=0x1A8, pc=xxxxxxxx,
ra=xxxxxxxx, sp=xxxxxxxx
There is no workaround.
•
CSCdv42338
The Integrated Local Management Interface (ILMI) does not come up if a virtual connection (VC)
is configured while the interface is in the shutdown state. The ILMI VC fails to respond when the
shutdown interface configuration command followed by the no shutdown interface configuration
command is entered on the interface. An “ILMI VC not properly configured” message is displayed
on the console after the debug atm ilmi interface command is entered.
Workaround: Configure the ILMI VC with old mode commands when the interface is not in the
shutdown mode.
•
CSCdv42995
Symptoms Callback calls are not made when user profiles are obtained from authentication,
authorization, and accounting (AAA) and a callback server may reload when the clear interface
dialer EXEC command is entered.
Conditions This symptom is observed on a Cisco AS5300 that is running Cisco IOS Release 12.2 T.
Workaround There is no workaround.
•
CSCdv45322
After a call is placed through a BRI interface on a Cisco 3600 router that is running
Cisco IOS Release 12.1(10), 12.2(5), 12.2(5.3)T, or 12.2(4)T, no more calls can be placed until the
clear interface type card/subcard/port privileged EXEC command is entered on the interface. This
defect affects basic-net3 on all platforms. There is no workaround.
•
CSCdv46203
When a Virtual Private Dialup Network (VPDN) call is disconnected from a client, VPDN sessions
are left connected indefinitely between a Layer 2 Tunneling Protocol (L2TP) Access Concentrator
(LAC) and an L2TP Network Server (LNS).
Caveats for Cisco IOS Release 12.2
OL-3513-16 Rev. G0
643
Resolved Caveats—Cisco IOS Release 12.2(6):
Workaround: Manually clear the sessions from the LAC or LNS using the clear vpdn tunnel EXEC
command.
•
CSCdv47047
A Cisco router may reload if the Point-to-Point Tunneling Protocol (PPTP) Access Concentrator
(PAC) is configured to perform compulsory tunneling. Currently, compulsory tunneling is not
supported by Cisco. There is no workaround.
•
CSCdv48687
A Cisco 800 router may reload because of spurious memory access. There is no workaround.
•
CSCdv48897
A Cisco router may reload if a virtual access interface goes down while the output of the show dialer
interface EXEC command is viewed. There is no workaround.
•
CSCdv50861
When an attempt is made to connect to a Cisco router using a 40-bit or 128-bit Microsoft
Point-to-Point Encryption (MPPE) protocol, the connection fails with an error, indicating that the
remote computer does not support the required encryption type. There is no workaround.
•
CSCdv63243
The Cisco 3600-js-mz image of Cisco IOS Release 12.2(5.8) may reload when global switch
commands are configured. There is no workaround.
Caveats for Cisco IOS Release 12.2
644
OL-3513-16 Rev. G0
Resolved Caveats—Cisco IOS Release 12.2(5d)
Resolved Caveats—Cisco IOS Release 12.2(5d)
Cisco IOS Release 12.2(5d) is a rebuild of Cisco IOS Release 12.2(5). All caveats listed in this section
are resolved in Cisco IOS Release 12.2(5d) but may be open in previous Cisco IOS releases.
•
CSCdw65903
An error can occur with management protocol processing. Please use the following URL for further
information:
http://www.cisco.com/cgi-bin/bugtool/onebug.pl?bugid=CSCdw65903
Resolved Caveats—Cisco IOS Release 12.2(5c)
Cisco IOS Release 12.2(5c) is a rebuild release for Cisco IOS Release 12.2(5). The caveats in this section
are resolved in Cisco IOS Release 12.2(5c) but may be open in previous Cisco IOS releases.
•
CSCdv64020
Traffic that is sent across a large number of interfaces that are set up for IP Security (IPSec)
protection but on which no IPSec tunnels are established, can cause a Cisco router that is running
Cisco IOS Release 12.2 to display out of memory errors.
Workaround: Arrange the network topology so that such traffic patterns do not occur.
Resolved Caveats—Cisco IOS Release 12.2(5a)
Cisco IOS Release 12.2(5a) is a rebuild release for Cisco IOS Release 12.2(5). The caveats in this section
are resolved in Cisco IOS Release 12.2(5a) but may be open in previous Cisco IOS releases.
•
CSCdu00328
A Cisco 7500 series router may stop receiving packets on certain interfaces when you reload a
Cisco 6500 series switch that is connected through a port channel. This situation does not occur if
you remove the port channel.
Workaround: Run normal IP between the Cisco 7500 series router and the Cisco 6500 series switch
without the port channel configuration.
•
CSCdu17280
A Meet Me conference call on a Cisco Catalyst 4000 access gateway module that is configured in
gateway mode for conferencing and transcoding may fail to receive audio in one direction. There is
no workaround.
•
CSCdv30465
In a configuration that has a Cisco AS5300 Voice Gateway configured as an egress point and that
has Cisco SC2200 Signaling Controller configured as an ingress point in a Signaling System 7 (SS7)
Interconnect for Voice Gateway solution, the Cisco AS5300 Voice Gateway may fail to propagate
an alert if the isdn negotiate-bchan resend-setup command is enabled on the Cisco AS5300 Voice
Gateway and if the Cisco AS5300 Voice Gateway sends a “setup” message to the SC2200 Signaling
Controller. The SC2200 Signaling Controller will eventually release the channel with a “requested
circuit/channel not available” message (cause value 44). The Cisco AS5300 will send another
“setup” message to the Cisco SC2200 Signaling Controller on the same channel with a new call
reference value. If the Cisco AS5300 Voice Gateway receives an “alerting” message from the
Cisco SC2200 Signaling Controller, the Cisco AS5300 Voice Gateway will not propagate the
Caveats for Cisco IOS Release 12.2
OL-3513-16 Rev. G0
645
Resolved Caveats—Cisco IOS Release 12.2(5):
“alerting” message back across the H.323 cloud. The failure to propagate the “alerting” message
may cause the Cisco SC2200 Signaling Controller to disconnect the call with an error-handling
(recovery) procedure initiated by the expired timer (cause value 102). The timer on the
Cisco SC2200 Signaling Controller will wait for 10 seconds to receive a “progress”, “alert”, or
“connect” message for a call before the call is disconnected. There is no workaround.
Resolved Caveats—Cisco IOS Release 12.2(5)
This section describes possibly unexpected behavior by Cisco IOS Release 12.2(5). All the caveats listed
in this section are resolved in Cisco IOS Release 12.2(5). This section describes severity 1 and 2 caveats
and select severity 3 caveats.
Access Server
•
CSCdv01978
A Cisco AS5800 access server that is running Cisco IOS Release 12.1(05)XM with a Cisco System
Processing Engine (SPE) Recovery configured for MICA technology modems may experience
modem lockage and stop accepting calls. The show csm modem privileged EXEC command shows
the following output:
vdev status(0x00000500): VDEV_STATUS_BUSY.VDEV_STATUS_HASLOCK.
There is no workaround.
Basic System Services
•
CSCds73120
On rare occasions, channel-associated signalling (CAS) bit changes to a specific time slot on the
digital voice port may not be transmitted at the moment they were intended. The proper CAS bits
are transmitted when the CAS bit changes occur on another time slot. No workaround is necessary
because the situation is self-correcting.
•
CSCdt27851
Reverse Telnet through a Cisco 2600 series router that is using Kerberos authentication fails. This
situation does not occur if you use other authentication methods.
Workaround: Use a Kerberos client that sends the username in a Telnet suboption before the
credential is sent.
•
CSCdu20127
Connection trunks that are configured between Cisco MC3810 routers may fail to establish
themselves. This condition occurs if the busyout monitor voice-port configuration command is
configured on the voice ports when one or both of the routers are reloaded. The voice ports remain
in the “S_TRUNK_PENDING” VPM state.
Workaround:
(1) Unconfigure the busyout monitor voice-port configuration command on all the voice ports.
Caveats for Cisco IOS Release 12.2
646
OL-3513-16 Rev. G0
Resolved Caveats—Cisco IOS Release 12.2(5)
(2) Enter the shut command followed by the no shut command on the voice ports that are installed
on both routers to force the trunks to establish themselves. If the voice ports are digital, apply the
shut command followed by the no shut command to both Digital Voice Modules (DVMs) (also
known as “controller T1 1”) instead of the voice ports.
(3) After the routers are reloaded, force all the voice ports into a “S_TRUNK_BUSYOUT” VPM
state by administratively shutting down the interfaces that are being monitored on both routers. If
the monitored interfaces are the WAN interfaces connecting the routers, it is sufficient to shut down
one side of the link and to wait for line protocol to go down on both sides. After the voice ports are
busied out, bring up the monitored interfaces again, and the connection trunks will establish
themselves.
•
CSCdu56864
On some platforms, a router may reload after the show tcp status EXEC command is entered. There
is no workaround.
•
CSCdu60467
A Cisco 7200 router with fast ethernet ports implemented using a vendor-specific ethernet controller
(seen through show controller) and configured for ethernet trunking will forward received frames
with a destination MAC address other than that of the router. In most network topologies, this will
have little effect other than a slightly increased traffic load. However, in some specific topologies
with multiple routers suffering this problem, a feedback loop can be created that will cause high
traffic loads and extreme levels of router CPU utilization. The problem has only been seen on 12.2
IOS.
Workaround: Use ethernet interfaces that are based on a different ethernet controller, or disable
trunking.
•
CSCdu87408
A Cisco 2600 or 3600 series router that is running Cisco IOS Release 12.2(3) with Class-Based
Weighted Fair Queueing (CBWFQ) configured over a Dialer Profile interface bound to ISDN PRI
or BRI ports may reload with a bus error or segmentation violation (SegV) exception when the dialer
interface disconnects.
Workaround: Disable fair queueing on the member interfaces used by the DPI. For example, on a
router, if Dialer1 uses dialer pool 1 and interfaces BRI 1/0 and BRI 1/1 are members of this pool,
modify the configuration for BRI 1/0 and BRI 1/1 by entering the no fair-queue interface
configuration command to disable fair-queueing on them. Similarly, disable fair-queueing on PRI
interfaces as well.
•
CSCdu87634
A Cisco router that is running Cisco IOS Release 12.2(2)XA with network access servers (NASs)
may not try the second server in the list if the first server is not responding. There is no workaround.
•
CSCdv02498
A Cisco 7200 router that is running Cisco IOS Release 12.2.(3.5) may reload when adding
Class-Based Weighted Fair Queueing (CBWFQ) to an output policy after an earlier attempt failed
because of applying service policy at an input interface. There is no workaround.
•
CSCdv02994
A Cisco 7200 series router running Cisco IOS Release 12.2(3.5) with any Quality of Service (QoS)
feature configured on the input interface will cause police on a non-ATM output interface to fail.
There is no workaround.
Caveats for Cisco IOS Release 12.2
OL-3513-16 Rev. G0
647
Resolved Caveats—Cisco IOS Release 12.2(5):
•
CSCdv15024
Symptoms The unspecified bit rate (UBR) switched virtual circuits (SVRs) call reserved bandwidth
equal to the peak cell rate (PCR).
Conditions Symptoms appear in Cisco IOS Release 12.2(2)T and earlier releases.
Workaround There is no workaround.
DECnet
•
CSCdt93828
The floating static route should be installed for the up rather than the down interface in a dial-backup
environment in which DECnet routing is used with multiple floating static routes that are configured
to reflect multiple dial-on-demand routing (DDR) interfaces. There is no workaround.
EXEC and Configuration Parser
•
CSCdu56787
Symptoms A Cisco router may experience a hung EXEC process that may cause a high CPU load
when it is left idle for a prolonged period of time.
Conditions This symptom occurs under rare conditions. Attempts to clear the line will not remove
the active Telnet sessions.
Workaround Reload the router.
IBM Connectivity
•
CSCds17994
A Cisco 7200 series router displays duplicate ring violation messages when the debug source event
command is turned on, even though there is no duplicate ring at all. There is no workaround.
•
CSCdt67073
A Cisco router that has the data-link switching plus (DLSw+) Ethernet redundancy feature
configured may reload if the Ethernet redundancy commands are removed from an Ethernet
interface during normal operation using the no dlsw local-peer global configuration command. This
situation occurs only when there are multiple circuits that are between the same pair of MAC
addresses but that are up and running on different service access points (SAPs).
Workaround: Enter the dlsw disable global configuration command before making any DLSw
configuration changes on the Ethernet interface, such as removing the DLSw local peer. Bring down
the DLSw circuits before changing the configuration. Shut down the local interface over which your
DLSw circuits are running and wait for the circuits to go down before changing the configuration.
•
CSCdt67148
On a Cisco 7200 series router, if incoming packets over a FDDI interface include a Routing
Information Field (RIF), fast switching causes switched packets to be corrupted.
Workaround: Disable fast switching by entering the no ip route-cache interface configuration
command.
Caveats for Cisco IOS Release 12.2
648
OL-3513-16 Rev. G0
Resolved Caveats—Cisco IOS Release 12.2(5)
•
CSCdu34139
Bridging does not work from an Inter-Switch Link (ISL) sub-interface to a Data-Link Switching
(DLSw) Fast Sequenced Transport (FST). After the DLSw cache is build (sabme-ua), the subsequent
frames are inserted into the ISL link as plain Ethernet frames without ISL encapsulation. This causes
the DLSw circuit to break. This feature does not work in any prior Cisco IOS Release.
Workaround: Use DLSw, TCP, or set up a bridge from the main Fast Ethernet interface.
•
CSCdu43189
A Cisco router that is configured for Data-Link Switching (DLSw) Ethernet Redundancy support
may reload if connection to an upstream device is lost. Examples of an upstream device would
include a router implementing SNA Switching Services (SNASw), or a router with a connection to
a mainframe via a Channel Interface Processor (CIP) or a Channel Port Adaptor (CPA).
Workaround: Use transparent bridging instead of Ethernet Redundancy to allow Ethernet-attached
end stations to access DLSw+.
•
CSCdu51476
Data-Link Switching (DLSw) Ethernet Redundancy may not work on the FastEthernet ports. This
condition occurs either on a C7200-I/O-2GE/E or a C7200-I/O-2FE/E input/output controller that is
installed on a Cisco 7200 series router.
Workaround: Use DLSw with transparent bridging.
Alternate workaround: Use a separate FastEthernet port adapter instead of the integrated
FastEthernet/gigabit ethernet ports on the I/O module.
•
CSCdu65099
A vendor-specific controller may not be connected to a Systems Network Architecture (SNA)
switch. This condition occurs because the vendor-specific controller sends an IEEE exchange
information ID (XID) to sap 0x00 as explorer frames (in place of test polls). When SNA Switching
Services (SNASw) is configured on a physical Token Ring interface or a virtual Token Ring
interface, there is no response to the IEEE XID. There is no workaround.
•
CSCdu71380
A Cisco router that is running Cisco IOS Release 12.1(03a)T01 with a DLSw+ Ethernet Redundancy
(DLSW-ER) circuit may pause indefinitely in the COLLECTING state when displayed with the
show dlsw transparent cache privileged EXEC command. The result is that the DLSw circuit is
not established. The DLSw reachability is correct, but the exchange of identification (XID) is not
forwarded.
Workaround: Reload both of the DLSW-ER routers. Do not use the shut command in DSP
configuration mode followed by the no shut command on one of the DLSW-ER interfaces in an
attempt to clear the problem because this action causes the other DLSW-ER router to reload.
Interfaces and Bridging
•
CSCdp88674
ATM subinterfaces might appear as INACTIVE when you use the show atm vc privileged EXEC
command. This symptom occurs when you add new subinterfaces to the router. Using the shut and
the no shut commands on the subinterface do not correct the problem.
Workaround: Use the shut command followed by the no shut command on the main interface in
order to bring the state to ACTIVE.
Caveats for Cisco IOS Release 12.2
OL-3513-16 Rev. G0
649
Resolved Caveats—Cisco IOS Release 12.2(5):
•
CSCds27794
A Cisco router that is running Cisco IOS Release 12.1(02.06)E with distributed Cisco Express
Forwarding (dCEF) enabled drops packets rather than punting them when using distributed
switching to or from a Token Ring interface.
Workaround: Disable distributed CEF switching on Token Ring interfaces.
•
CSCds65930
Symptoms Bridge protocol data units (BPDUs) of the spanning tree are not passed over an ISDN
line.
Conditions This symptom is observed on a Cisco 2600 series router.
Workaround There is no workaround.
•
CSCds71828
Symptoms The debug token ring EXEC command gives the following extra output when applying
the access-list 1100 filter:
riflen 10, rd_offset 6, llc_offset 24 *Nov
14 11:48:35: riflen 10, rd_offset 6,
llc_offset 24 riflen 12, rd_offset 2,
llc_offset 26 riflen 8, rd_offset 3,
llc_offset 22 riflen 8, rd_offset 260419,
llc_offset 22 riflen 8, rd_offset -148349,
llc_offset 22 riflen 8, rd_offset
-1097469, llc_offset 22
Conditions The symptom occurs when this output is printed for all packets and should only be output
for access list checks matching the Media Access Control (MAC) addresses specified in the
access-list.
Workaround There is no workaround.
•
CSCdt05584
The decnet host global configuration command does not function with IP distributed Cisco Express
Forwarding (dCEF) enabled. All other DECnet functions work properly.
Workaround: Upgrade to Cisco IOS Release 12.2(5).
•
CSCdt59038
When Multilink Protocol (MLP) over ATM is used, a data transfer with a large packet size does not
work, and active voice call quality may degrade to an unacceptable level.
Workaround: Use a packet size smaller than the per vc tx_ring_limit.
•
CSCdu43315
In a configuration with multiple T1 through T3 interfaces, it may not be possible to query for Simple
Network Management Protocol (SNMP) statistics because the snmpwalk and snmpget functions do
not display data for some interfaces. There is no workaround.
•
CSCdu53910
After the line protocol for the ATM-Circuit Emulation Services (CES) is enabled, the line protocol
may become disabled and remain disabled. There is no workaround.
Caveats for Cisco IOS Release 12.2
650
OL-3513-16 Rev. G0
Resolved Caveats—Cisco IOS Release 12.2(5)
•
CSCdu75801
Symptoms A Cisco router may reload when a channel group is first configured, then unconfigured,
and reconfigured again.
Conditions This symptom is observed on a Cisco 7500 series router that is running Cisco IOS
Release 12.2(03.02)T with channelized port adapters(CT3/Ce3/Ct1/CE1).
Workaround There is no workaround.
•
CSCdu80623
A Cisco router running Cisco IOS Release 12.2(03.03)T (rsp-pv-mz.122-3.3.T image) with the
tag-switching ip interface configuration command enabled on a channelized CT3 Port Adapter with
a Versatile Interface Processor (VIP) and Multiprotocol Label Switching (MPLS) enabled may
display a DMA-1-DRQ_EMPTY_PAK message. There is no workaround.
IP Routing Protocols
•
CSCdp05523
If the address range defined in a Network Address Translation (NAT) pool is large, CPU utilization
may rise to 100 percent.
Workaround: Reduce the TCP translation timeout to clear the earlier entries.
•
CSCdr11869
Static outside Network Address Translation (NAT) may not work with Cisco Express Forwarding
(CEF) if CEF was active before NAT. There is no workaround.
•
CSCds41275
The Open Shortest Path First (OSPF) router process may cause CPU utilization to increase to 99
percent utilization and cause low memory problems after a router is upgraded to Cisco IOS
Release 12.0(13)S.
Workaround: Remove and reconfigure the router OSPF.
•
CSCds67028
A Cisco 7200 series router may reload with a bus error in ipigrp2_ager while running Enhanced
Interior Gateway Routing Protocol (EIGRP). There is no workaround.
•
CSCdt19638
A Cisco router may not propagate an updated Border Gateway Protocol (BGP) best path to other
BGP peer routers. This condition occurs under rare circumstances.
Workaround: Enter the clear ip bgp * out EXEC command to update BGP peer routers with the
current best path attributes.
•
CSCdu01537
Under certain circumstances in a redundant topology, traffic loss can occur for up to 60 seconds after
the designated router (DR) has rebooted. There is no workaround.
•
CSCdu32820
A router with a configuration containing IP static routes with an administrative distance of 115 may
reload when the Intermediate System-to-Intermediate System (IS-IS) Protocol Partial SPF is run.
This problem occurs regardless of whether the static route is redistributed into IS-IS. This behavior
Caveats for Cisco IOS Release 12.2
OL-3513-16 Rev. G0
651
Resolved Caveats—Cisco IOS Release 12.2(5):
has been observed on Cisco 2500 series and 3600 series routers that are running Cisco IOS Release
12.0(10)S, 12.0(7)T, 12.1(5), or 12.1(8). An error message similar to the following may be observed
in the log as a result of the reload:
%CLNS-1-LINKERR: ISIS: LSP prev doesn.t point at head in 0x1C524E, lsp_next 0x0,
lsp_prev 0x0, index 0, ver 0, head 0x155AAC -Traceback= 37C5006 37C52E4 37C55FC
37A1A00 37A1C5A 37A2750 37C2428 37C2FF2 37B7B6A 37B82C8
An IP static route with an administrative distance of 114 or 116 does not cause a reload.
Workaround: Use an administrative distance other than that of 115 since 115 conflicts with IS-IS.
•
CSCdu46694
A Cisco 7500 router that is running Cisco IOS Release 12.1(8) may experience some packet loss
between hosts after Cisco Express Forwarding (CEF) is enabled. There is no workaround.
•
CSCdu47997
A Cisco 12000 series Internet Router that is running Cisco IOS Release 12.0(14)ST may experience
a Border Gateway Protocol (BGP) filter list that may fail to deny all the prefixes that are received
from a peer that has a matching as-path attribute on the regular expression. This condition only
occurs only when as-path filter lists and route-maps are used for inbound filtering for the same BGP
peer.
Workaround: Do not configure an as-path access list to be applied to the BGP neighbor using the
neighbor {ip-address | peer-group-name} filter-list access-list-number {in | out} command.
•
CSCdu58623
Symptoms The Border Gateway Protocol (BGP) update may be processed and propagated without
resetting the BGP peer.
Conditions This symptom occurs when a Cisco router receives AS-PATH attributes with
confederation information from an external Border Gateway Protocol (eBGP) neighbor that is not a
Cisco router.
Workaround Configure an AS-PATH filter “(*)” with the eBGP neighbor.
•
CSCdu61858
In a Multiprotocol Label Switching (MPLS) virtual private network (VPN) environment, a provider
edge (PE) router that is running Open Shortest Path First (OSPF) should consider only Type-3 link
state advertisements (LSAs) that are coming from the backbone area (area 0). In some situations a
PE router may mistakenly consider Type-3 LSA that are coming from a nonbackbone area and install
the prefix advertised by the Type-3 LSA in the VPN routing/forwarding instance (VRF) routing
table.
Workaround: Force the full shortest path first (SPF) algorithm by entering the clear ip ospf
{process} EXEC command.
•
CSCdu62451
Symptoms A Cisco router may experience %SYS-2-BADSHARE errors and tracebacks messages
while Network Address Translation (NAT) translates Internet Locator Service (ILS) packets.
Conditions This symptom occurs on a Cisco router that is running Cisco IOS Release 12.2 with NAT
configured.
Workaround There is no workaround.
•
CSCdu66094
When a static auto-rendezvous point (RP) configuration (all interface sparse-mode) is used and the
RP-announce is sourced from a physical interface, the router may not register to the mapping agent.
This may result in the RP not being advertised.
Caveats for Cisco IOS Release 12.2
652
OL-3513-16 Rev. G0
Resolved Caveats—Cisco IOS Release 12.2(5)
Workaround: Use a Loopback interface as the rp-announce source.
•
CSCdu69313
Symptoms A Cisco router may reload.
Conditions This symptom occurs when a Cisco router that is running Network Address Translation
(NAT) with watchdog timeout indicates the number of NAT translations are high and translations
are timing out.
Workaround Configure a large timeout value.
•
CSCdu70301
Symptoms Cisco routers that are using Network Address Translation (NAT) in certain
configurations may generate Internet Control Message Protocol (ICMP) “type 3 code 4” messages
containing untranslated IP addresses in the header of the original IP packet.
Conditions This symptom is observed on Cisco routers that are running Cisco IOS Releases 12.1,
12.1 T, 12.2, and 12.2 T configured with NAT.
Workaround Add NAT commands (identify translations if no translation is needed) to force NAT to
translate the header of the ICMP packet.
•
CSCdu73495
A Cisco router that is running Cisco IOS Release 12.1 may sometimes experience Enhanced Interior
Gateway Routing Protocol (EIGRP) routes that cannot be seen even when the message digest
algorithm 5 (MD5) is authenticated on all routers. This problem is intermittent and may occur when
authentication is turned off and subsequently turned back on again. Sometimes, this problem occurs
just after authentication is enabled.
Workaround: This problem is intermittent and may be resolved by disabling and reenabling
authentication a second time. This problem also may be resolved automatically after a few minutes.
•
CSCdu79625
Cisco routers running Enhanced Interior Gateway Routing Protocol (EIGRP) may point to each
other for certain IP prefixes under rare circumstances, causing a routing loop. There is no
workaround.
•
CSCdu81936
If a Cisco router receives an Address Resolution Protocol (ARP) packet that has the routers own
interface address but with a different Media Access Control (MAC) address, the ARP packet can
overwrite the routers own MAC address in the ARP table, causing that interface to stop sending and
receiving traffic. This attack is successful only against interfaces on the Ethernet segment that is
local to the attacking host.
Workaround: Hard code the interface ARP table entry by using the arp ip-address hardware-address
type [alias] global configuration command. This entry will remain in the ARP table until the no arp
ip-address hardware-address type [alias] global configuration command is issued.
Refer to the advisory at the following URL:
http://www.cisco.com/warp/public/707/IOS-arp-overwrite-vuln-pub.shtml
Note
•
Note: This caveat does not apply to switches that are running Cisco CatOS software, only to
switches running Cisco IOS software.
CSCdu83660
Symptoms Race condition may cause a reload.
Caveats for Cisco IOS Release 12.2
OL-3513-16 Rev. G0
653
Resolved Caveats—Cisco IOS Release 12.2(5):
Conditions This symptom may occur by a code change in CSCds41275.
Workaround Replace the original code.
•
CSCdu84602
A Cisco 1700 series router running Cisco IOS Release 12.2 with a Cisco CallManager hardware
conference device connected to two IP phones on the outside interface may experience a one way
audio problem during a conference using Network Address Translation (NAT) with overload.
Workaround: Use NAT only without overload.
•
CSCdv04214
A Cisco router that is running Cisco IOS Release 12.2 may reload when attempting to generate an
Open Shortest Path First (OSPF) summary or external link-state advertisements (LSAs) under
depleted memory conditions. There is no workaround.
•
CSCdv05881
A Cisco 7200 series router that is running Cisco IOS Release 12.2(3) may reload with a red-zone
violation error when multiple configuration lines of IP Network Address Translation (IP NAT) pool
addresses are specified. There is no workaround.
•
CSCdv13170
Symptoms When multicast packets are fast switched, spurious access messages will appear and
cause a high CPU load.
Conditions Fast switching of multicast packets is enabled.
Workaround There is no workaround.
•
CSCdv18044
Symptoms A memory leak of approximately 1KB occurs for individual Multicast Source Discovery
Protocol (MSDP) connection retry intervals. The default is 60 seconds.
Conditions Symptom appears on a Cisco router that is running Cisco IOS Release 12.1(8a)E03
when an MSDP peer with a higher IP address fails.
Workaround Use the MSDP configuration command, ip msdp shutdown
{peer-address|peer-name},
•
to shut down the session to the unreachable peer.
CSCdv22980
Symptoms A Cisco router may reload with illegal access to low address.
Conditions A Cisco router configured with Network Address Translation (NAT) may reload with
illegal access to a low address. This condition is caused by the attempt to allocate memory in the
interrupt path.
Workaround Disable Cisco Express Forwarding (CEF) switching and Fastswitching.
ISO CLNS
•
CSCdu42374
Symptoms A Cisco router may reload.
Conditions A Cisco router may reload if the Multiprotocol Label Switching (MPLS) traffic
engineering (TE) tunnel has a very large topology, for example, too many downstream nodes behind
the tail-end tunnel.
Caveats for Cisco IOS Release 12.2
654
OL-3513-16 Rev. G0
Resolved Caveats—Cisco IOS Release 12.2(5)
Workaround Configure the mpls traffic-eng max-child 0 command under the router isis command
to disable the autoroute optimization.
Miscellaneous
•
CSCdp09904
When matching proxy identities, IP Security (IPSec) matches the local and remote identities as
given in the access control list (ACL) and reverses the remote and local identities. This condition
can cause failures because reversing the proxy identities may cause the identities to match a higher
priority crypto map that has an ACL entry that covers the reversed identities.
Workaround: Find the peer listed in the lower priority crypto map entry. Add that peer again to the
higher priority crypto map entry.
•
CSCdr63534
When the maximum transmission unit (MTU) size on an asynchronous interface is changed, large
packets do not get forwarded even though they are correctly negotiated by point-to-point protocol
(PPP).
Workaround: Enter the shut command followed by the no shut command on the interface or enter
the clear interface EXEC command to force the interface to recognize the new MTU setting.
•
CSCds12178
A Cisco Lightstream 1010, Catalyst 8540, or Catalyst 8510 switch that is operating Multiprotocol
Label Switching (MPLS) on ATM interfaces may exhibit label virtual circuit (LVC) resource
exhaustion on all interfaces when LVC allocation is performed with label-controlled ATM
(LC-ATM). LVC allocation will fail when the end of the Virtual Connection Identifier (VCI) range
is reached and if the start or end VCI value is not divisible by 32. This occurs because of an error in
how the resource management routines handle label allocation.
Workaround: Define a VCI range using the start and end values that are divisible by 32.
•
CSCds38408
Routed bridge encapsulation (RBE) does not pad frames from less than 64 bytes Ethernet size to
exactly 64 bytes Ethernet size if the router fast-switches the packet. But if the remote site does not
pad the frame, the frame is dropped on the Ethernet as a runt.
Workaround: Turn off fast switching on the ATM interface.
•
CSCds75021
A Cisco 8230 router that has the Cisco WAN Manager (CWM) enabled may not be able to add
interfaces or subinterfaces to the route processor module (RPM) card. The CWM is affected by this
condition because the interface interface-type configuration command requires a reference to the
slot number being used.
Workaround: Use a command or script that does not use the slot number in referencing an interface
or subinterface. The slot number is assumed to be the slot/card that you are issuing the command to.
•
CSCds84896
If two routers are linked by multiple links and if you use the no tag-switching ip interface
configuration command on some of the interfaces, while the tag-switching ip interface
configuration command is still configured on the other links, then tagged packets continue to be
forwarded through the untagged interfaces.
Workaround: Enter the no tag-switching ip interface configuration command followed by the
tag-switching ip interface configuration command on all the interfaces.
Caveats for Cisco IOS Release 12.2
OL-3513-16 Rev. G0
655
Resolved Caveats—Cisco IOS Release 12.2(5):
•
CSCds86023
A PA-E3 controller installed on a Cisco 7206VRX router that is running Cisco IOS Release
12.0(13)S, 12.0(14)S, or 12.1(5) may reset itself frequently. One carrier transition is registered for
each interface reset. The output of the show controllers privileged EXEC command shows that the
tx_fullring value increases in proportion to the interface resets. Under this condition, a memory leak
in the I/O-2 pool reloads the router. There is no workaround.
•
CSCdt18150
A Cisco 7500 series router that is equipped with Versatile Interface Processor (VIP) modules
capable of distributed switching and configured with label-controlled ATM interfaces in
multi-virtual circuit mode stops forwarding traffic to the multi-VC destinations after toggling
distributed Cisco Express Forwarding (dCEF) off and on with the no ip cef, ip cef distributed
command sequence.
Workaround: Use CEF instead of dCEF.
Alternate workaround: Clear the IP routing table using the clear ip route EXEC command.
•
CSCdt33317
On a Cisco 7500/RSP series router, packets that are received on a Spatial Reuse Protocol (SRP)
interface and switched on the Route Switch Processor (RSP) will fail to get Cisco Express
Forwarding (CEF) or fast switched going into a tunnel interface and get dropped. This situation only
occurs on the Cisco 7500/RSP routers with SRP interfaces.
Workaround: Disable CEF and fast switching on the tunnel interface.
•
CSCdt51547
With certain ATM subinterfaces, the ip verify unicast reverse-path interface configuration
command may incorrectly drop a fraction of incoming traffic. There is no workaround.
•
CSCdt60299
A Cisco router that is running Cisco IOS Release 12.1(5)T1 or 12.2(1a) may reload with the
following conditions when traffic shaping is configured:
– The following conditions are found in logs and/or reload information:
%SYS-3-OVERRUN: Block overrun at 63CFDB50 (red zone 00000120)
-Traceback= 60337258 6033A0C0 6033B190 6033B3D8 6032AFE4 6032AFD0
%SYS-6-MTRACE: mallocfree: addr, pc 63BCC844,60343A48 63BCC844,3000001E
6388EAA8,60343A48 6388EAA8,3000002A 63B2BFFC,60344000 63B2BFFC,30000050
63B2BFFC,603444C8 6388EAA8,60343B80
%SYS-6-MTRACE: mallocfree: addr, pc 63BCC844,60343B80 63C5FA98,6085DB28
63C5FA98,608569FC 63C5FA98,3000001E 63C5FA98,6085DB28 63C5FA98,608569FC
63C5FA98,3000001E 63C5FA98,6085DB28
%SYS-6-BLKINFO: Corrupted redzone blk 63CFDB50, words 14, alloc 604CC338, InUse,
dealloc 0, rfcnt 1
-Traceback= 60334EC4 6033726C 6033A0C0 6033B190 6033B3D8 6032AFE4 6032AFD0
%SYS-6-MEMDUMP: 0x63CFDB50: 0xAB1234CD 0x21 0x63D8C71C 0x61B888F8
%SYS-6-MEMDUMP: 0x63CFDB60: 0x604CC338 0x63CFDB94 0x63CFDAC8 0x8000000E
%SYS-6-MEMDUMP: 0x63CFDB70: 0x1 0x602B1614 0x0 0x0
– The following conditions are found by using the show version EXEC command following the
reload:
System returned to ROM by error - a Software forced crash, PC 0x<hexvalue> at <time
date>
There is no workaround.
Caveats for Cisco IOS Release 12.2
656
OL-3513-16 Rev. G0
Resolved Caveats—Cisco IOS Release 12.2(5)
•
CSCdt66581
The Gigabit Ethernet (GE) line card or Fast Ethernet card on a either a Cisco 7200-I/O-2FE or a
7200-I/O-GE input/output controller that is installed on a Cisco 7200 series router may stop
receiving packets.
Workaround: Clear the interface using the clear interface type slot/port EXEC command.
•
CSCdt71082
A Cisco 7200 series router that is using any DS3 port adapter configured with two or more DS3
interfaces may experience line flaps at high rates of traffic. The router logs the following message:
MUESLIX-1-HALT: Mx serial: Serial6/0 TPU halted: cause 0x3 status 0x00371A00
There is no workaround.
•
CSCdt78894
If a Cisco AS5400 universal access server that is running Cisco IOS Release 12.2 experiences a
reload, the stack trace will be lost if another reload related to exception handling occurs. There is
no workaround.
•
CSCdt85206
A Cisco 7200 Internet router that is running Cisco IOS Release 12.1 with a multichannel DS1/PRI
port adapter (PA-MC-4T1) may experience calls that pause indefinitely. The calls that are dropped
will not get reestablished. There is no workaround.
•
CSCdt88628
Due to a defect in modem management, a modem may become wedged in the management state and
cannot be recovered by reinitialization (including downloading a new copy of portware). Once
modem recovery is configured, modem recovery should occur automatically and should not require
additional operator intervention.
Workaround: Issue the clear modem all EXEC command to clear the modem.
•
CSCdt89644
A Cisco 3600 series router that is running Cisco IOS Release 12.1 T and 12.2 T may experience an
Internetwork Packet Exchange (IPX) ping failure for both Generator and Reflector with the Routing
Information Field (RIF) not updated in the IPX network.
Workaround: Send the IPX packet to the unit under test (UUT) to update RIF and ping.
•
CSCdt94696
A Cisco 7200 series router that is running Cisco IOS Release 12.1(3a)T8 with an E1 interface that
is configured for E1 channel associated signaling (CAS) (specifically R2 signaling) may fail to
detect a G.704 CAS multiframe alignment error, thereby failing the G.704 standard for CAS
signaling. There is no workaround.
•
CSCdu00255
When an FTP client PC receives a file from an FTP Server, a Cisco 3640 router with a compression
network module (NM-COMPR) (HW revision 2.0) and an 4-port ISDN BRI network module
(NM-4B-S/T) pauses indefinitely. Other modules (for example, a 1-Port ISDN-BRI WAN interface
card [WIC 1B S/T]) work correctly. Software Compress also works correctly.
Workaround: Use a Cisco IOS release prior to Cisco IOS Release 12.1(4).
Caveats for Cisco IOS Release 12.2
OL-3513-16 Rev. G0
657
Resolved Caveats—Cisco IOS Release 12.2(5):
•
CSCdu05173
A Cisco 7500 series router may use invalid Cisco Express Forwarding (CEF) entries on Versatile
Interface Processors (VIPs) to switch traffic when distributed Cisco Express Forwarding (dCEF) is
disabled. The CEF entry on the Route Switch Processor (RSP) is valid while the entry on the VIP is
invalid.
Workaround: Reboot the VIP and use the clear cef line slot command to clear the lines for each VIP
until all the VIPs become visibly synchronized in the output when the show cef linecard command
is entered.
•
CSCdu06930
A Cisco 7500 series router that is running Cisco IOS Release 12.0(16)S with distributed Multilink
PPP (MLPPP) enabled may experience bounced traffic if the amount of traffic that is sent through
the multilink interface is double the capacity of the interface. There is no workaround.
•
CSCdu17981
A Cisco 5000 series router that is running Cisco IOS Release 12.2 may experience a ring number
and VLAN mismatch. A ring that does not exist in a network or has been previously configured
under a different VLAN may appear under a given VLAN.
In the following command output from the show source EXEC command, ring number 525 appears
to be configured under VLAN 207 although ring number 525 has been previously configured to be
under another VLAN.
bn: 15 rn: 525 local ma: 0000.0000.0000 Vlan207 fwd: 0
In the following command output, ring number 4095 appears to be associated with VLAN 109
although ring number 4095 has not been previously configured.
bn: 15 rn: 4095 local ma: 0000.0000.0000 Vlan109 fwd: 0
Workaround: Remove and reconfigure the VLAN configuration.
•
CSCdu19272
A Cisco 7206VXR router that is running Cisco IOS Release 12.1(5)T1 with a PA-VXC-2TE1+ port
adapter may reload with a bus error. The errors leading up to the bus error look like the following:
%VPA-3-TDMFAIL: VPA-TDM, access failed at ../pas/if_vpa_tdm .h - line 179,
arg1=0x00030003,arg2=0x00000023 -Traceback= 6154A068 6154A9CC 61541F54 615425E0
61538120 6150D384 6150D48C 61529 758 61529F10 6151AE1C 6151B198 6061FA24 6061FA10
%VPA-3-TSBUSY: VPA (bay 1), TDM timeslot is busy: ST=0/TS=1 7 -Traceback= 61549E88
6154A9CC 61541FD4 615425E0 61538120 6150D384 6150D48C 61529 758 61529F10 6151AE1C
6151B198 6061FA24 6061FA10 %SYS-3-LOGGER_FLUSHED: System was paused for 00:00:00 to
en sure console debugging output.
There is no workaround.
•
CSCdu19311
A Cisco 2621 router with a Dual-Port Fast Ethernet Port Adapter, a High Density Voice Network
Module, and a 2-Port RJ-48 multiflex Trunk - E1 multiflex voice/WAN interface card may reload in
about 10 to 20 seconds after the router accepts a call that is placed to the fax extension. This
symptom does not occur if the calls to the fax extension are not answered. There is no workaround.
•
CSCdu19800
On the voice compression module (VCM) module in a Cisco 3810 Multiservice Access
Concentrator, when FAX calls are placed such that two fax calls are routed through a single digital
signal processor (DSP), the FAX calls fail and no more FAXes (even single calls) can be handled by
that DSP. Voice calls will still be handled successfully. There is no workaround.
Caveats for Cisco IOS Release 12.2
658
OL-3513-16 Rev. G0
Resolved Caveats—Cisco IOS Release 12.2(5)
•
CSCdu21674
A Cisco 7500 series router that has Multicast Distributed Fast Switching (MDFS) enabled may stop
processing multicast packets if MDFS is disabled globally using the ip multicast-routing global
configuration command (without the distributed keyword) without first disabling MDFS on the
input interface using the ip mroute-cache interface configuration command (without the distributed
keyword).
Workaround: To avoid this problem, first disable MDFS on the input interface with the ip
mroute-cache interface configuration command and then disable MDFS globally with the ip
multicast-routing global configuration command.
Reenable MDFS using the ip multicast-routing [distributed] global configuration command.
Alternate workaround: Disable MDFS on the versatile interface processor (VIP) using the ip
mroute-cache interface configuration command. MDFS can then be disabled globally on the router.
If this does not work, reload the router and set the MDFS status as desired.
•
CSCdu21792
When adaptive pacing is used on a System Network Architecture (SNA) session, a branch network
node (BrNN) may send an isolated pacing message (IPM) with a next-window size that is too large
for the available memory on the router. This condition may result in SYS-2-MALLOCFAIL
messages and the loss of logical unit-logical unit (LU-LU) sessions. There is no workaround.
•
CSCdu24289
A Cisco AS5300 universal access server that is used as an originating gateway (OGW) and running
a c5300-js-mz.122-1.2 image along with Tool Command Language (TCL) interactive voice response
(IVR) 1.0 scripts may experience a memory leak after dropping active voice calls. This leak occurs
approximately after 48 hours of testing with 3.5MB of memory. There is no workaround.
•
CSCdu24409
When the compress-config service is enabled on a router while there is a configuration file that is
greater than the size of the NVRAM, the following error message is displayed when the
copy rcp://username@servername/config.name startup-config command is entered:
Accessing rcp://username@servername/config.name...! %Error copying
rcp://username@servername/config.name (Not enough space on device)
There is no workaround.
•
CSCdu26813
A Cisco 2600 Advanced Integration Module (AIM)-virtual private networking (VPN)/Base
Performance (BP) advanced interface module on a Cisco 2600 router may fail to decrypt inbound
traffic if Cisco Express Forwarding (CEF) is used with hardware encryption in the tunnel mode.
Pings to the crypto peer may fail. A “zero” number of packets are encrypted or decrypted when the
show crypto engine accelerator statistics EXEC command is entered.
Workaround: Disable CEF and use fast switching instead.
•
CSCdu27865
A Cisco 4500 series router may experience memory problems and reload under conditions where
there are large numbers of IPSec tunnels configured and heavy traffic conditions. There is no
workaround.
•
CSCdu29524
Real-Time Transport Protocol (RTP) header compression may corrupt connection trunk signalling
under certain circumstances.
Workaround: Disable compression Real-Time Protocol (cRTP).
Caveats for Cisco IOS Release 12.2
OL-3513-16 Rev. G0
659
Resolved Caveats—Cisco IOS Release 12.2(5):
•
CSCdu30070
IP Security (IPSec) traffic that is sent over a digital subscriber line (DSL) connection that uses the
Asymmetric Digital Subscriber Line (ADSL) WAN Interface Card (WIC) and the Hardware
Encryption accelerator module for a Cisco 1700, a Cisco 2600, or a Cisco 3600 series router fails
when a dialer interface configuration is used. The input queue of the dialer interface wedges and all
traffic is dropped.
Workaround: Configure a virtual template instead of a dialer interface to pass encrypted traffic.
•
CSCdu30194
Flapping an ATM subinterface on a Cisco 7500 series router that is running Cisco IOS
Release 12.2(2)T or 12.2(2)T1 may result in a Virtual Interface Processor (VIP) reload when all of
the following conditions are true:
– There are two Multiprotocol Label Switching (MPLS) enabled ATM subinterfaces (each on a
different physical interface).
– The Multi-VC feature is configured.
– The output service policy is attached.
– Traffic headed for a certain destination that uses either of the ATM subinterfaces as an outgoing
interface.
There is no workaround.
•
CSCdu32267
There is a mismatch in the rsvp received label and the label that is installed in the Tag Forwarding
Information Base (TFIB).
Workaround: Enter the no mpls ip global configuration command followed by the mpls ip global
configuration command.
•
CSCdu34038
Fancy queueing cannot be configured on X.25 encapsulated serial interfaces. This problem affects
all platforms. There is no workaround.
•
CSCdu35229
Hyper Text Transfer Protocol (HTTP) over Secure Socket Layer (HTTPS) on port 443 is not timing
out of the command output of the show ip inspect sessions detail EXEC command after the FINs
are exchanged. There is no workaround.
•
CSCdu36171
A configuration with multiple interfaces assigned to the same rlm-group is not supported on a Cisco
router that is running Cisco IOS Releases 12.2(3), 12.2(2)XA, or 12.1(5)XM4. If this unsupported
configuration is used, when the first rlm-group is removed and then a second rlm-group is removed,
the gateway router reloads. This situation is seen only when multiple interfaces are assigned to the
same unsupported rlm-group configuration.
Workaround: Do not run the router with this unsupported configuration. If it is accidentally
configured, remove the first rlm-group, write the configuration, reboot, and then remove the other
rlm-group.
•
CSCdu36716
For virtual access interface on a Cisco 7500 router that has distributed Cisco Express Forwarding
(dCEF) switching enabled, the packets that are destined to go out from the virtual access interface
gets dropped at the ingress interface of the Versatile Interface Processor (VIP).
Caveats for Cisco IOS Release 12.2
660
OL-3513-16 Rev. G0
Resolved Caveats—Cisco IOS Release 12.2(5)
Workaround: Disable dCEF switching on all VIP interfaces using the no ip route-cache distributed
command.
•
CSCdu37163
On a Cisco router, when Internet key exchange (IKE) keepalives are not used, the IPSec Security
Associations (SAs) are being deleted when the IKE SA gets deleted. This is a change in our
behavior, and would cause backward compatibility issues with older versions, by resulting in IPSec
SAs which will be up on one side (using an older version), and one side not having the IPSec SAs.
There is no workaround.
•
CSCdu40761
Spurious access is observed on a Cisco 7500 series router when a serial link is added to the multilink
bundle while distributed Multilink PPP (dMLP) is enabled. There is no workaround.
•
CSCdu40777
A fxo-m1 card may not allow outbound calls to be made. The port goes offhook and then back
onhook. This condition occurs when 8 or 11 digits are sent at the same time. Outbound calls can be
made, and a dial tone will be generated if only a single digit is sent.
Workaround: Use the fxo card instead of the fxo-m1 card.
•
CSCdu41673
The input and output rate statistics on an ATM subinterface on a Cisco 7500 router are not correctly
reported. There is no workaround.
•
CSCdu44294
A Cisco 7500 series router running Cisco IOS Release 12.2 with Operations, Administration, and
Maintenance (OAM) functionality enabled on a ATM switch using multiple routed protocols over
permanent virtual circuits (PVCs) may experience spurious memory access. There is no
workaround.
•
CSCdu44831
Symptoms During Service Processing Element (SPE) firmware download, if other SPEs on that line
card have active calls, the SPEs on that line card may become stuck in boot mode, or the line card
may reload.
Conditions This symptom is observed on a Cisco AS5850 Universal Gateway.
Workaround There is no workaround.
•
CSCdu47052
A Cisco 3660 router that is running Cisco IOS Release 12.2(0.5g) or 12.2(1) with a NM-1HSSI
module may experience very intermittent bursts of carrier transitions that may bring down the line
protocol.
Workaround: Reload the router.
•
CSCdu47187
A Systems Network Architecture (SNA) switch may fail to release the buffers when memory is low.
There is no workaround.
•
CSCdu47419
When a file with a size between number and number-1 clusters is copied to an ATA disk that has a
free space of number clusters, a truncated file may be created with a “Bad DFS cluster data passed”
message. Each cluster is 4k in size. There is no workaround.
Caveats for Cisco IOS Release 12.2
OL-3513-16 Rev. G0
661
Resolved Caveats—Cisco IOS Release 12.2(5):
•
CSCdu47982
Symptoms When a call is made between two phones that are connected via a Voice over Frame Relay
(VoFR) link, the progress indicator (PI) value of the incoming alerting message on the VoFR call leg
is overwritten to a value of 8, causing the originating router to cut through the voice path in a forward
direction awaiting ringback in-band regardless of whether ringback is actually sent. The PI value
should not be overwritten but should be forwarded as is, over the VoFR link.
Conditions These symptoms are observed on Cisco 3600 and Cisco 2600 series routers that are
configured with VoFR and are running Cisco IOS Release 12.2(1). This condition occurs when the
terminating phone is connected to a PBX that is in turn connected to a Cisco 3600 series router over
an E1 line. If the PBX fails to return a ringback, even when a ringback is requested in the outgoing
setup, no ringback is heard.
Workaround There is no workaround.
•
CSCdu48065
The caret character (^) is not accepted in the destination-pattern command or the incoming
called-number command in the dial-peer configuration mode. This is a change from previous
versions. There is no workaround.
•
CSCdu48296
Symptoms On Media Gateway Control Protocol (MGCP) controlled calls, echo cancellation is set
to “OFF” by default. An echo is heard on the voice path.
Conditions This symptom is observed on Cisco IOS Releases 12.1(5)T, 12.2, and 12.2 T.
Workaround There is no workaround.
•
CSCdu48362
Symptoms A router shelf may reload.
Conditions This symptom is observed at WATCHDOG TIMER RESET when the pri-group
timeslots 1-24 command is removed from the controller configuration.
Workaround There is no workaround.
•
CSCdu48652
Voice calls may pause indefinitely when Flash MIBs for a vendor-specific Flash device located in
slot 0 or slot 1 of a Cisco 7200 series router are queried. Depending on the protocols that are running,
the calls may hang indefinitely or clear after a short period of time.
Workaround: Avoid querying the Flash device or remove the cards located in slot 0 or slot 1.
•
CSCdu48930
A Cisco voice gateway running Cisco IOS Release 12.2(0.5e) may experience memory
fragmentation, which could lead to memory allocation failures. The circumstances under which this
may happen are unknown. There is no workaround.
•
CSCdu49630
A Cisco router may reload with a bus error when more than one call is received from an Accord
Multipoint Conferencing Unit. The following messages will be displayed in the log.
%CALL_CONTROL-6-CALL_LOOP: The incoming call has a global identfier already present
in the list of currently handled calls. It is being refused.
%SYS-3-MGDTIMER: Timer not a leaf, set_exptime, timer = 62D22480.
-Process= "CCPROXY_CT", ipl= 0, pid= 90 -Traceback= 605F359C 605F3DE4
Caveats for Cisco IOS Release 12.2
662
OL-3513-16 Rev. G0
Resolved Caveats—Cisco IOS Release 12.2(5)
605F3EFC 611CF934 611CC6D8 611CD8B0 611D4DE0 611D6730 605DF544 605DF530
%SYS-3-LOGGER_FLUSHED: System was paused for 00:00:00 to ensure console debugging
output.
There is no workaround.
•
CSCdu49836
A Cisco 1750 router does not support the ext-signal under the dial peer. There is no workaround.
•
CSCdu49898
A Cisco 7500 router that is running the Enhanced Interior Gateway Routing Protocol (EIGRP) and
flow switching may reload at dss_ip_calc_global_cms. There is no workaround.
•
CSCdu50752
Internet Key Exchange (IKE) negotiation that uses authentication by public key encryption (RSA
encryption may fail if the public key of the peer is entered with the named-key key-name
[encryption | signature] public key configuration command.
Workaround: Supply an address to the named-key public key configuration command that
corresponds to the IP address of the peer.
•
CSCdu52247
Symptoms Fax calls may fail if the dial peer is configured with the fax rate 12000 dial-peer
configuration mode command.
Conditions This symptom is observed when using fax relay with Cisco IOS Release 12.2(2)T. Other
fax data rates work fine.
Workaround There is no workaround.
•
CSCdu52446
Symptoms The originating gateway (OGW) reloads because of memory leaking.
Conditions This symptom happens under two circumstances:
– OGW with Open Settlement Protocol (OSP) enabled, under heavy load
– OGW with OSP enabled, call comes in within 5 seconds after gateway (GW) reboots
Workaround Turn off OSP.
•
CSCdu52687
A Cisco router may reload when the mpls label protocol ldp interface configuration command is
configured on a subinterface that has the tag-switching ip global configuration command and the
mpls label protocol tdp interface configuration command enabled.
Workaround: Enter the no tag-switching ip global configuration command on the router before
changing the tag switching from label distribution protocol (LDP) to tag distribution protocol (TDP)
or from TDP to LDP.
•
CSCdu53060
The ATM Permanent Virtual Circuit (PVC) Inverse Address Resolution Protocol (Inverse ARP) may
not work as expected. Inverse ARP requests are not replied when the interface is a point-to-point
connection.
Workaround: Use a point-to-multipoint connection if ATM Inverse ARP is used, or use the protocol
statement under the PVC configuration mode.
•
CSCdu53890
A H.323 gateway make leak H.245 sockets after the listening sockets have been accepted or
connections have been established from listening state. There is no workaround.
Caveats for Cisco IOS Release 12.2
OL-3513-16 Rev. G0
663
Resolved Caveats—Cisco IOS Release 12.2(5):
•
CSCdu54507
A Cisco router may reload when the no ip cef global configuration command is entered after all
bindings (Headend, Tailend, and Transit virtual circuit [VC]) are established on a Label Switch
Controller (LSC). There is no workaround.
•
CSCdu54754
In Cisco IOS Release 12.2(1b), calls originating from ISDN (PRI or BRI) trunk may experience
problems with codecs and playout values. The following are descriptions of the problems:
1) VTSP-3-DSP_TIMEOUT and VTSP-3-DSPALARM error messages generated when G723
codecs are configured. This problem is easily reproducible, and results in call failures 100% of the
time.
2) When G711 codec should be negotiated, G728 is being selected instead.
3) When adaptive jitter buffering is selected, the router is not using this method, but is using a
constant 15 msec.
There is no workaround.
•
CSCdu55874
When calls that are already established or in the setup stage go through the gateway and you enter
the ds0 busyout 1-24 controller configuration command, the resource monitor sometimes shows the
channels that were in use as free when they should be disabled. There is no workaround.
•
CSCdu57137
If the write erase command is entered on a Cisco 7200 router that is running Cisco IOS Release
12.2(3), the configuration register is set to 0x0. This condition may cause the router to pause at the
ROMMON mode the next time the router is reloaded.
Workaround: The configuration register needs to be changed to the desired setting to avoid this
issue. Enter the confreg 0x2102 command in ROMMON mode or enter the config-register 0x2102
command in the global configuration mode.
•
CSCdu57580
A Cisco 2650 router that is running Cisco IOS Release 12.2(2.2) with a 3-DES image may
experience a memory leak that is originated by the crypto Internet Key Management Protocol
(IKMP) process. There is no workaround.
•
CSCdu58607
On a Cisco 7500 series router that is running Cisco IOS Release 12.0(13)S2 with no service
single-slot-reload-enable configured and distributed Cisco Express Forwarding (dCEF) enabled,
the online insertion and removal (OIR) of a Versatile Interface Processor (VIP) can cause the
Multilink interfaces in other slots to go down, and the following error appears on the console:
%OIR-6-REMCARD: Card removed from slot 4, interfaces disabled %RSP-3-NOIDB: bad vc 3
on E1 9/1/0 %RSP-3-NOIDB: bad vc 3 on E1 9/1/1 %RSP-3-NOIDB: bad vc 3 on E1 9/1/2
%RSP-3-NOIDB: bad vc 3 on E1 9/1/3
After the message, the Multilink interface will go down together with the physical interfaces it is
using, and the following messages are displayed:
%LINK-3-UPDOWN: Interface Multilink4, changed state to down %LINEPROTO-5-UPDOWN:
protocol on Interface Serial9/1/0:0, changed state to down %LINEPROTO-5-UPDOWN:
protocol on Interface Serial9/1/1:0, changed state to down %LINEPROTO-5-UPDOWN:
protocol on Interface Serial9/1/2:0, changed state to down %LINEPROTO-5-UPDOWN:
protocol on Interface Serial9/1/3:0, changed state to down
Line
Line
Line
Line
Caveats for Cisco IOS Release 12.2
664
OL-3513-16 Rev. G0
Resolved Caveats—Cisco IOS Release 12.2(5)
After these messages, the router usually recovers, and all interfaces go up again. This situation does
not occur when CEF is running instead of dCEF.
Workaround: Disable the keepalives on the member interfaces of the Multilink interface.
•
CSCdu58992
When large frames are sent to a Ethernet, Fast Ethernet, or Gigabit Ethernet interface that uses the
i82543 MAC chip, the chip may continue to write descriptors back past the end of the descriptor
ring, possibly causing a memory corruption. There is no workaround.
•
CSCdu59135
A Cisco router that is using Open Shortest Path First (OSPF) may experience a memory leak in the
small buffers. This problem can only be seen in 12.2(1) or earlier versions. Since 12.2(1.1), the
problem only can be seen if the multilink queuing bypass-fifo hidden command is configured. There
is no workaround.
•
CSCdu59676
A Cisco AS5300 series access server that is running Cisco IOS Release 12.2(1) disallows use of the
test cch323 ras down and test cch323 ras up commands to reset a Registration, Admission, and
Status (RAS) session between the Voice over IP (VoIP) gateway and its gatekeeper without tearing
down the active calls. There is no workaround.
•
CSCdu59975
A glare condition may occur randomly on all voice platforms in Cisco IOS Release 12.2(1a),
12.2(2)T, or 12.2 XA when a busy port is assigned to a new incoming call. A glare condition occurs
when two calls are assigned to the same port. For example, if there are only two ports, and they are
both busy on a call when a new call comes in without a check for glare, one of the busy ports is
allocated to the new call. This condition causes the preexisting call to be disconnected and the new
call to receive a busy signal. There is no workaround.
•
CSCdu59998
Logical unit (LU) 6.2 sessions with Customer Information Control System (CICS) over an
Enterprise Extender (EE) using connection network may come up fine initially but may
subsequently be dropped.
Workaround: Do not use a connection network; instead predefine the EE links.
•
CSCdu60320
When two voice gateways that are configured with slow start for H.232 calls have mismatching
codec types with a remote gateway, the remote gateway may reload. There is no workaround.
•
CSCdu60369
The logging synchronous line configuration command may cause logging to stop.
Workaround: Remove this command.
•
CSCdu60508
When a Cisco Gateway General Packet Radio Service (GPRS) Support Node (GGSN) is configured
to send Echo Request messages, the GGSN may periodically fail to receive the Echo Response
message from a peer Serving GPRS Support Node (SGSN) and the GGSN will resend the Echo
Request messages to the SGSN. The subsequent Echo Request messages contain some useless bytes
after the regular message. The incorrect Echo Request messages will be ignored by SGSN, and this
causes the GGSN to delete the existing policy decision point (PDP) contexts associated with this
SGSN after several unsuccessful retries (according to the R3-Request parameter). There is no
workaround.
Caveats for Cisco IOS Release 12.2
OL-3513-16 Rev. G0
665
Resolved Caveats—Cisco IOS Release 12.2(5):
•
CSCdu60632
If a virtual trunk for Voice over IP is configured using the connection trunk command the router
will reload unexpectedly each time it attempts to activate the trunk. If the connection trunk
command is in the startup config then the router will reload unexpectedly immediately after
reloading.
Workaround: Avoid configuring the connection trunk command with the c7200-is-mz.122-2.5
image.
•
CSCdu61652
Automatic Number Identification (ANI) digits are not sent for the outgoing Voice calls over E1
trunks that are confirmed to use R2 signaling. There is no workaround.
•
CSCdu61796
If a spoke router is reloaded in a hub-and-spoke topology with IP Security (IPSec), the spoke router
may reload with a SegV exception for a certain configuration. This condition has been observed with
the Cisco 827 router.
Workaround: Remove the configuration for the remote users from the hub router, specifically, the
portion that relates to assigning IP addresses from the local address pool.
•
CSCdu61932
A Cisco 2600 or Cisco 3600 router that is running Cisco IOS Release 12.2(1.2) or a later release
with a vwic-1mft or vwic-2mft installed may experience dropped pings, low audio quality
(crackling, pops), and controller errors (line code violations, slips).
Workaround: Use Cisco IOS Release 12.2(1) or a release that precedes Release 12.2(1.2).
•
CSCdu62170
On a Cisco 6400 node route processor (NRP) that is running Cisco IOS Release 12.1(5)DC1 or
earlier, the Node Route Processor Fast Ethernet (NRP FE) port driver may reset when on
encountering late collisions and may also lose Open Shortest Path First (OSPF) process and OSPF
neighbor relationships. There is no workaround.
•
CSCdu62489
Enabling multicast fast switching may result in spurious accesses that cause high CPU utilization.
There is no workaround.
•
CSCdu62702
A Cisco 7100 router that is running Cisco IOS Release 12.2(2.3) may fail after a tunnel that is
configured as a crypto interface is removed from a serial interface. There is no workaround.
•
CSCdu62998
A Cisco 3660 router may occasionally reload after the no frame-relay map-class command is
entered.
Workaround: For a Frame Relay interface, change the map-class service-policy after shutting down
the interface.
•
CSCdu63407
On a Cisco voice gateway, the show call active voice EXEC command may take several minutes to
display the call leg information when there is a large number of active calls. There is no workaround.
Caveats for Cisco IOS Release 12.2
666
OL-3513-16 Rev. G0
Resolved Caveats—Cisco IOS Release 12.2(5)
•
CSCdu64325
In a Multiprotocol Label Switching (MPLS)/virtual private network (VPN) inter-autonomous
system (InterAS) environment, if a Cisco router is configured as a VPN-IPv4 (vpnv4) Autonomous
System Boundary Router (ASBR) and a provider edge (PE) router at the same time and if the VPN
routing/forwarding instance (VRF) is removed from the ASBR configuration, tag-switching may
fail for all prefixes in the VRF that have the same route distinguisher (RD) as the VRF that was
removed. This condition occurs when all the PE routers use the same route distinguished (RD) for
a VRF.
Workaround: Use different RDs.
Alternate workaround: Clear the Border Gateway Protocol (BGP) sessions after disabling the VRF.
•
CSCdu64444
On a Cisco 7400 series router that is running Cisco IOS Release 12.2(01)DX, Inter-Switch Link
(ISL) packets may not be recognized by Cisco Express Forwarding (CEF) switching. This situation
occurs only on PA-2FE-TX, PA-2FE-FX, C7200-I/O-2FE/E, C7200-I/O-GE+E, and C7401 native
Gigabit Ethernet ports. All ISL packets are process switched, and the Committed Access Rate
(CAR) feature does not work.
Workaround: Use port adaptors other than those specified above.
•
CSCdu64798
A Cisco 7206VXR router that is running Cisco IOS Release 12.2(0.12)T with NPE-300 encounters
a memory allocation failure in the IP Input process when trying to allocate abnormally large
amounts of memory. A CPUHOG is seen indeterminate way and may cause it to reload.
%SYS-2-MALLOCFAIL: Memory allocation of 1658983256 bytes failed from 0x60F075B0, pool
Processor, alignment 0 -Process= “IP Input", ipl= 0, pid= 38
-Traceback= 605E4A68 605E66D8 60F075B8 60EFF344 60F00D84 60F01360 60F0169C 60F00C08
60F01360 60F0182C 60EFCC44 60EFBD1C 60EB20D4 60EB3E58 60E9EF84 60E9F4B0
%SYS-3-CPUHOG: Task ran for 99392 msec (636/252), process = IP Input, PC = 606DF9E0.
-Traceback= 606DF9E8 605DB264 605DB250
There is no workaround.
•
CSCdu65008
Outgoing ISDN calls fail if the connected switch responds to an outgoing setup with a setup
acknowledgement followed by a “Call Proceeding” message. This situation applies to all ISDN PRI
voice platforms and has been observed in Cisco IOS Release 12.2(1) and any later releases.
Workaround: Configure the isdn sending-complete command on the serial interface. This action
forces ISDN to send a “sending complete” information element in the outgoing setup, so the switch
will simply reply with a “Call Proceeding” message.
•
CSCdu65048
After debug sanity is enabled on Cisco routers that support particles, the routers may experience a
memory leak and reload. The amount of time that it takes for the memory leak to surface and the
reload to occur varies. There is no workaround.
•
CSCdu65282
Inbound calls from a channel associated signaling (CAS) peer to a Cisco VG200 telephony voice
gateway that are bound for an IP phone may experience audio drop-outs. The called party will hear
approximately the first half second of audio and then lose one to three seconds. After that time, the
audio will return, and no further issues occur with the call after the initial dropout. Outbound calls
do not experience this condition.
Workaround: Run Cisco IOS Release 12.1(5)T9.
Caveats for Cisco IOS Release 12.2
OL-3513-16 Rev. G0
667
Resolved Caveats—Cisco IOS Release 12.2(5):
•
CSCdu68873
A Cisco 3640 router may reload after receiving a voice call that cannot be set up because of
insufficient bandwidth allocation by Resource Reservation Protocol (RSVP). There is no
workaround.
•
CSCdu69124
A Cisco AS5300 universal access server that is running Cisco IOS Release 12.2 (1), 12.2(2b), or
12.2(2.4) may see the %SYS-3-INVMEMINT and %SYS-2-MALLOCFAIL error messages and
cdapi_create_raw_msg tracebacks. There is no workaround.
•
CSCdu69283
Multiprotocol Label Switching (MPLS) does not function on a Cisco router that is running the
Enterprise/FW/IDS Plus IPSec 56 feature set. The 0/32 permanent virtual circuit (PVC) is not
established by the router. This situation does not occur with smaller feature sets, such as the
Enterprise feature set. There is no workaround.
•
CSCdu69287
The frequency of 402.75 MHz has been added to the list of frequencies that will be searched
immediately following the North American channel search plans.
•
CSCdu69292
A Cisco 7206VXR router that is running Cisco IOS Release 12.0(17)ST with a Gigabit Ethernet Port
Adapter (PA-GE) may stop forwarding traffic after logging the receipt of giant frames or packets.
The interface pauses indefinitely but continues to increment the overrun counter in the show
interface gigabit command output.
Workaround: Enter the shut command in DSP configuration mode followed by the no shut
command for the interface.
•
CSCdu69500
A Cisco router or access server that is running Cisco IOS Release 12.1 or 12.2 with Virtual Private
Dialup Network (VPDN) configured may reload if the router or access server has low memory.
Workaround: Ensure that sufficient memory is available on the router or access server.
•
CSCdu70532
Gateway does not ignore CAS signaling that is less than 100ms in duration as per EIA/TIA-464B
specification.
•
CSCdu71811
A Cisco AS5400 universal access server that is running Cisco IOS Release 12.2 for incoming E1/R2
calls sends an abnormal clear-forward (AB=10) signal in the seize-acknowledge state. Instead, the
Cisco AS5400 should send a congestion signal followed by a clear-backward (AB=11) signal and
wait for the remote site to send a clear-forward signal. Switches of certain types take exception to
the abnormal signal and block the circuit. There is no workaround.
•
CSCdu71991
Class-based Weighted Fair Queueing (CBWFQ) inside Generic Traffic Shaping (GTS) may fail
when a service policy is attached while traffic is running. This failure occurs because spurious
accesses can cause the router to pause indefinitely.
Workaround: Stop traffic, and then attach or remove the service policy.
Caveats for Cisco IOS Release 12.2
668
OL-3513-16 Rev. G0
Resolved Caveats—Cisco IOS Release 12.2(5)
•
CSCdu73738
On a Cisco router for which flow control is set during a V.120 PPP session, data transfer may fail to
continue even when flow control is released. This condition persists until the T203 timer (default
value 10 seconds) indeterminate way and may cause it to reload expires and causes a low throughput
rate to a user session instead of using the timer T200 (default value 1 second) as per V.120 link layer
specifications. This situation affects all Cisco IOS software products that support ISDN or V.120.
There is no workaround.
•
CSCdu74485
Symptoms Caller ID information is not collected with T1 CAS FXO GroundStart.
Conditions This problem has been observed on a Cisco 3600 series router with a T1/E1 NM-HDV
packet voice network module. It may occur on the Cisco 2600 series router.
Workaround There is no workaround.
•
CSCdu74951
A Cisco 7500 series router with a Route Switch Processor 4 (RSP4) may reload with a bus error
when issuing through a Telnet connection by using the no service-policy output name command in
subinterface atm configuration mode.
Workaround: Issue the no service-policy output global configuration command from the console
port.
•
CSCdu75477
A Cisco router may experience a slow memory leak in the Non-Secure Shell (SSH) of TCPs. There
is no workaround.
•
CSCdu76221
A Cisco router may not be able to ping between directly connected Cisco Resource Pool Manager
Servers (Cisco RPMS) and there are no entries in the ATM mapping table. One RPM uses the main
interface of the second subinterface.
Workaround: Use the subinterface or configure static map manually.
•
CSCdu76437
A Cisco router for which the shut global configuration command is used followed by the no shut
command on a voice port with connection trunk configuration may experience a reload. There is no
workaround.
•
CSCdu78603
A Cisco router that is running Cisco IOS Release 12.2(2.1) may reload because of a problem with
the QSIG Message Waiting Indicator (MWI) that causes a loop in the Call Distributor Application
Programming Interface (CDAPI). The peer side may continue to see the same facility message.
There is no workaround.
•
CSCdu79417
On a Cisco router that is running Cisco IOS Release 12.2(03.02)T for which a running configuration
is saved, unnecessary exclamation point (!!!) characters may appear in the configuration output.
There is no workaround.
Caveats for Cisco IOS Release 12.2
OL-3513-16 Rev. G0
669
Resolved Caveats—Cisco IOS Release 12.2(5):
•
CSCdu79506
Symptoms Not able to process piggyback message when running MGCP/NCS 1.0.
Conditions This symptom is observed when the Call Agent uses the “carriage return, line-feed”
character sequence (CRLF) to terminate message lines.
Workaround There is no workaround.
•
CSCdu79582
A Cisco AS5300 access server (all Voice platforms) running Cisco IOS Release 12.2(02)XA (and
all releases which support translation-rule) may find that Session Initiation Protocol (SIP) calls to a
Madge switch are failing on the Terminating Gateway. This occurs when the Calling/Called Party
Number Octet 3 values (Type of Number and Numbering Plan) are set to UNKNOWN (because the
SIP protocol cannot transport these attributes), which causes the Madge switch to reject the call.
There is no workaround on the Cisco Gateway. Therefore there is no workaround for private branch
exchanges (PBXs) that cannot accept Unknown Numbering Plan in the Calling Party information
element (IE) and/or Called Party IEs in the SETUP message.
•
CSCdu80702
Symptoms All incoming tagged packets on an ATM tagswitching subinterface may be process
switched.
Conditions This symptom is observed on a Cisco 7200 series router.
Workaround There is no workaround.
•
CSCdu81007
The Cisco Express Forwarding (CEF) table is not updated properly when the IP address of an
interface changes. The new IP address is added to the CEF table but the old one is not removed. If
subinterfaces are used, the old ones remain in the CEF table even after the subinterfaces are
removed.
Workaround: The IP address is correctly deleted from the CEF tables when you shut the subinterface
before changing the address.
•
CSCdu81435
A Cisco 7200 series router that is running Cisco IOS Release 12.2 may reload when the crypto
command is used in global configuration mode. There is no workaround except not to use this
command.
•
CSCdu81518
On a Cisco router that is running Cisco IOS Release 12.2 the interface for which the ip address dhcp
command is being run takes too long to transition to the “up” state, so the Dynamic Host
Configuration Protocol (DHCP) client code gives up and no address is assigned. This condition is
specific to ATM interfaces and Bridge Group Virtual Interfaces (BVIs) with associated ATM
interfaces.
Workaround: Reissue the ip address dhcp command on the interface once the interface has
successfully transitioned to the “up” state.
•
CSCdu81625
A Cisco 2600 series router running Cisco IOS Release 12.2(3.4)T using Voice/WAN interface cards
(VWICs)–VWIC-2MFT-G703 or VWIC-1MFT-G703 only–in unframed E1 mode may experience
large numbers of line errors. There is no workaround.
Caveats for Cisco IOS Release 12.2
670
OL-3513-16 Rev. G0
Resolved Caveats—Cisco IOS Release 12.2(5)
•
CSCdu82070
When a Cisco 7200 series router that is running Cisco IOS Release 12.1(05)T09, 12.2 12.2 T, or
12.0 S is configured with TAG-ATM and TAG-non-ATM interfaces, the flapping “tag ip” at the
global level may cause an inconsistent local tag in the tailend VC and forwarding table, resulting in
packets being forwarded to the wrong destination.
Workaround: After entering the no tag ip RTR configuration command at the global level, wait for
about 3 minutes to allow the tailend VC to be torn down, and then enter the tag ip command.
•
CSCdu82789
A Cisco IOS Mobile IP Home Agent that is running Cisco IOS Release 12.1(9.2) may reload when
buffered packets are freed in the Mobile IP standby code path. This code path is used when the
primary Home Agent (HA) does not receive binding update acknowledgements from the standby
HA.
If a binding update is sent to the standby router, and if an acknowledgement is not received, the
binding update is queued for retransmission. If the primary HA has not received an
acknowledgement after three retransmissions, there will be one last attempt before the buffer is
cleared. A reload may occur if this sequence of events occurs repeatedly over a short period of time.
The loss of communication with the standby HA or sustained high CPU utilization on the standby
HA can cause this condition to occur. A high CPU utilization condition can trigger this situation by
affecting the Binding Update Acknowledgements. The acknowledgements are delayed because the
CPU is too busy to dedicate time to send them. Many factors can affect a router CPU and result in
a sustained high CPU condition. While this condition may not be favorable under certain
circumstances, high CPU utilization can be a normal and acceptable condition.
Workaround: A patch can be applied to prevent the buffer from being released twice. The patch will
be available first in the Cisco IOS Release 12.1(10.1) interim release. This fix will be integrated into
the Cisco IOS Release 12.1(11) maintenance release.
•
CSCdu83068
On a Cisco AS5400 access server that is running Cisco IOS Release 12.2, the dial modifiers “X”,
“W” and “,” do not work for outgoing calls. Dial modifiers are used only for multiple stage dialing.
There is no workaround.
•
CSCdu84031
A Cisco 7500 series router that is hosting an ATM-PA-A1 port adapter in a Versatile Interface
Processor (VIP) may begin losing its rx-side buffers when a high volume of traffic is sent through
the router. The high volume of traffic may also increase the “rx-freeze” counter in the command log
of the show controller vip slot tech-support EXEC command. There is no workaround.
•
CSCdu85978
A Cisco 7500 router may reload when Link Fragmentation and Interleaving (LFI) is configured.
There is no workaround.
•
CSCdu86320
A Cisco 7200 series router that is running Cisco IOS Release 12.1(9) may experience a flapping line
protocol on a full-duplex Fast Ethernet interface when Hot Standby Router Protocol (HSRP) is
configured with nondefault timer values and the Ethernet cable is removed.
Workaround: Ensure the HSRP hello and hold times are at least 3 and 10 seconds respectively, or
configure the burned in address.
Caveats for Cisco IOS Release 12.2
OL-3513-16 Rev. G0
671
Resolved Caveats—Cisco IOS Release 12.2(5):
•
CSCdu87662
A Cisco AS5400 access server undergoes a software-forced reload when stress tested in a mixed call
environment. The probable cause is the calligrapher process which is eating into the CPU resource.
There is no workaround.
•
CSCdu87914
A Cisco 1750 router that is running Cisco IOS Release 12.2 encounters calls that end with a one-way
audio problem. When a customer calls either from the public switched telephone network (PSTN)
side or from a Cisco 1750 router side, the call establishment goes fine and then conversation occurs
for a while (more than one minute). Then both sides hear a “click,” after which the PSTN side cannot
hear anything, although the Cisco 1750 side can still hear the PSTN side. There is no workaround.
•
CSCdu87975
A Cisco AS5400 access server that is running Cisco IOS Release 12.2(02)XA and using a Cisco SS7
Interconnect for Voice Gateways solution may experience a bus error reload at the function
rlm_reopen_links after initially adding Non-Facility Associated Signaling (NFAS) interfaces and
performing a shut command in DSP configuration mode on the Redundant Link Manager (RLM)
group. There is no workaround.
•
CSCdu88786
A Cisco AS5800 access server that is running Cisco IOS Release 12.1(05)XM4 and that is
configured to make outgoing Voice over IP (VoIP) calls with E1/R2 signaling may occasionally
generate the following TIMEOUT message, although calls will still go through:
%VTSP-3-DSP_TIMEOUT: DSP timeout on event 0x59: DSP ID=0x30103: DSP Disc (call mode=0)
There is no workaround. This condition does not exist on other platforms, on a Cisco AS5800 that
is running another type of line signaling, or on a Cisco AS5800 configured for taking incoming VoIP
calls over E1/R2 signaling.
•
CSCdv00152
A Cisco 2600 or 3600 series router that is running Cisco IOS Release 12.2(3) does not support the
compand-type a-law command in voice-port configuration mode on the Command Line Interface
(CLI) for a Basic Rate Interface (BRI) port. Therefore, it is not possible to configure the Cisco 2600
or 3600 series router to work with Integrated Services Digital Network (ISDN) BRI port with a-law.
There is no workaround.
•
CSCdv00770
A foreign agent router may reload after the show ip mobile visitor address EXEC command is
entered if the address argument is not a designated visiting node on the router.
Workaround: Enter the show ip mobile visitor EXEC command without the address argument on
the foreign agent router. This command entry may cause a substantially long list of mobile node
visitors to be displayed.
•
CSCdv00963
When configuring more than one trusted root certification authority (CA) for Cisco IOS
Release 12.2, RA mode CA authentication may fail.
Workaround: Configure only one trusted root CA.
•
CSCdv01853
A Cisco router that is running Cisco IOS Release 12.2(3.5) may experience a software-forced reload
at ip_arp_refresh_adj after the no shutdown command is entered on a multipoint subinterface in
LAN Emulation (LANE) testing. There is no workaround.
Caveats for Cisco IOS Release 12.2
672
OL-3513-16 Rev. G0
Resolved Caveats—Cisco IOS Release 12.2(5)
•
CSCdv03724
On a Cisco AS5300 access server that is running Cisco IOS Releases 12.2(3a) or 12.2(4)T all voice
calls that are running ISDN signaling fail to process a disconnect, which leads to a buffer leak. There
is no workaround other than to reboot.
•
CSCdv04770
On a Cisco 3600 series router that is running Cisco IOS Release 12.2(1a) may find that a voice port
may not come back to its normal functional state after the shut command in DSP configuration mode
is used followed by the no shut command when there is an outgoing call terminated on the port
during the shutdown period. There is no workaround.
•
CSCdv04956
A Cisco server that is used as a Terminating gateway that is loaded with an “is” or “js” image may
experience memory leak in the CCH323_CT process under stress, which forces a reload. The leak
is attributed to H.245 tunneling configurations. When tunneling is enabled, the leak occurs.
Tunneling of the H.245 channel usually occurs when a dial peer is configured for DTMF Relay.
There is no workaround.
•
CSCdv05733
When a Cisco gateway router receives a facility message that has a “null” ISDN callref, it sometimes
assigns that call a CCAPI callID that is currently in use. By doing this, it is interfering with current
calls. Therefore, when the gateway router disconnects the leg associated with that facility message,
it also drops the leg of the previous call that is running at that time because they share the same
callID. There is no workaround.
•
CSCdv06717
Upon Switch Over in a Cisco SC2200 Signaling Controller, a Cisco AS5300 access server that is
running Cisco IOS Release 12.2 may lose some of its T1 Controllers. In this situation, bearer
channels on non-primary/secondary T1/E1 controllers will be lost or will be out of service. There is
no workaround.
•
CSCdv06837
The max-reserved-bandwidth interface configuration command is not accepted in a Cisco 7200
series router although it is accepted in a Cisco 7500 series router. This inconsistency causes a service
policy which can be accepted in a Cisco 7500 to suddenly not to be accepted. There is no
workaround.
•
CSCdv07928
A Cisco 2600 series router that is running Cisco IOS Release 12.2 with Voice/WAN Interface Cards
(VWIC-2MFT-T1-DI or VWIC-2MFT-E1-DI) may find that the Integrated Services Digital
Network (ISDN) layer2 will not come up after a reload. The following message is seen on the router
console during the reload:
!!!! s:t:c:ts 1:1:15:16 already configured!!!
In addition, the message “tdm voice connect failed” is displayed during boot up or when making
calls.
Workaround: Power cycle the router or reset time division multiplexing (TDM) switching and reload
the High Density Voice Network Modules (HDV) firmware.
•
CSCdv14277
A Cisco AS5300 access server that is running Cisco IOS Release 12.2(3) with Open Settlements
Protocol (OSP) may experience a memory leak caused by the CCH323_CT process that causes the
router to reload once memory is depleted. There is no workaround.
Caveats for Cisco IOS Release 12.2
OL-3513-16 Rev. G0
673
Resolved Caveats—Cisco IOS Release 12.2(5):
•
CSCdv14842
Symptoms A router may reload upon boot up.
Conditions Symptom occurs in a Cisco 4500 router that is running Cisco IOS Release 12.1(10.2)
with a LAN Controller Ethernet (LANCE) installed in slot 1 or slot 2.
Workaround Insert the Ethernet controller in slot 0.
•
CSCdv17923
Symptoms An E1 controller on a PA-VXC-2TE1+, PA-VXB-2TE1+, and PA-MCX-8TE1 may reset
itself once every two to three seconds.
Conditions Symptom occurs in Cisco 7200 series routers that are running Cisco IOS Release 12.2
when their controllers are connected to third-party PBXs.
Workaround There is no workaround.
•
CSCdv22719
A Cisco 2600 or 3600 series router that is running Cisco IOS Release 12.2 with a Virtual Private
Network (VPN) accelerator and a data compression advanced integration module (AIM) or a
network module (NM) installed may reload when the no crypto engine accelerator configuration
command is used. There is no workaround.
•
CSCdv23890
Symptoms When using a multiple number of T1 network modules (any of NM-1FE1CT1,
NM-1FE2CT1, NM-1FE1CT1-CSU, NM-1FE2CT1-CSU) in a Cisco 3600 router, some or all of the
network modules may be reported as unknown.
Conditions This condition may happen only when two or more of the above mentioned T1 network
modules are used in the same router.
Workaround Remove all cards so that only one T1 network module is present in the router.
•
CSCdv25816
Symptoms Non-recognition of a partitioned device.
Conditions TA partitioned device on a Cisco router that is running Cisco IOS Release 12.2(5) may
not be recognized after a partition operation.
Workaround There is no workaround.
•
CSCdv27837
When configuring more than one Trusted Root Certification Authority (CA) for Cisco IOS
Release 12.2, Remote Access (RA) mode CA authentication may fail.
Workaround: Configure only one trusted root CA.
•
CSCuk25747
A small memory leak of 144 to 288 bytes may occur each time a Hot Standby Router Protocol
(HSRP) group becomes active.
Workaround: Configure the standby use-bia interface configuration command.
Caveats for Cisco IOS Release 12.2
674
OL-3513-16 Rev. G0
Resolved Caveats—Cisco IOS Release 12.2(5)
Novell IPX, XNS, and Apollo Domain
•
CSCdt43958
Internetwork Packet Exchange (IPX) Enhanced Interior Gateway Routing Protocol (EIGRP) may
experience a memory leak related to IPX routing instability. There is no workaround.
TCP/IP Host-Mode Services
•
CSCdp39987
A Cisco AS5300 universal access server that is running Cisco IOS Release 11.3 T or 11.3(10.06)
AA may experience a software-forced reload with an error at PC 0x60201340. There is no
workaround.
Wide-Area Networking
•
CSCdk88854
On a Cisco 7200 and 3600 series router, bridging over Frame Relay on a BRI interface will fail when
static mapping is configured for the permanent virtual circuit (PVC).
Workaround: Use routing instead of bridging, or use a point-to-point subinterface.
•
CSCdp86381
Systems which use Virtual Private Dialup Network (VPDN) to tunnel PPP sessions may experience
buffer memory leaks on the home gateway router when those PPP interfaces have also negotiated
the use of PPP multilink.
In Cisco IOS releases prior to 12.2(1.1), this problem is only visible when multilink bundles which
include VPDN tunneled PPP links are configured to use non-first-in, first-out (FIFO) queuing
modes. As fancy queuing is not presently supported in conjunction with any form of VPDN session,
correcting the bundle configuration to use FIFO queuing suffices to avoid the problem. Starting with
Cisco IOS Release 12.2(1.1), the problem may also be seen even in cases where FIFO queuing is in
effect.
Workaround: Disable IP fastswitching (including CEF) on the interfaces which are carrying the
VPDN tunnelled traffic between the network access server (NAS) and the home gateway (HGW).
•
CSCdr87252
A Cisco router may reload when the traffic-shape EXEC command is configured with X.25 or Link
Access Procedure, Balanced (LAPB) encapsulation. Generic traffic shaping is not supported with
X.25 or LAPB encapsulation. X.25 or LAPB can be used without generic traffic shaping.
Workaround: Do not configure the traffic shape command with these protocols.
•
CSCds40925
On a Cisco LS1010 or 8500 series ATM switch, when you use the show atm interface [traffic]
EXEC command on an ATM subinterface, the total number of cells that has passed is shown as zero
(transmit as well as receive). The traffic rate on the subinterface is shown incorrectly.
Workaround: Use the Cisco IOS release that contains the fix for this caveat.
Caveats for Cisco IOS Release 12.2
OL-3513-16 Rev. G0
675
Resolved Caveats—Cisco IOS Release 12.2(5):
•
CSCds81335
On a Cisco AS5300 access server that is running Cisco IOS Release 12.1(03a)XI03 a Called Party
subaddress is not properly sent from the originating gateway to the terminating gateway. For
example:
On originating gateway: Called Party SubAddr i = 0xA021, ‘4’
On terminating gateway: Called Party SubAddr i = 0xA1, ‘P4’
There is no workaround.
•
CSCds85331
A Cisco 7500 series router that is running Cisco IOS Release 12.0(13.5)S with a Versatile Interface
Processor (VIP) may reload at fec_get_hwidb when distributed Cisco Express Forwarding (dCEF)
and forward error correction (FEC) are configured. There is no workaround.
•
CSCdt07395
Symptoms A router may reload.
Conditions This symptom is observed on a Cisco router when it tries to bring up the dialer to make
a X.25 pad call on the dialer interface.
Workaround There is no workaround.
•
CSCdt10355
Symptoms A Cisco router may reload.
Conditions This condition occurs when the primary rate interface (PRI) configuration is removed
when there is ongoing call traffic.
Workaround Avoid removing the PRI configuration when there is ongoing call traffic.
Alternate Workaround Enter the shut command before removing PRI configuration to avoid this
problem.
•
CSCdt70631
A Cisco 800 router may disconnect directory assistance service (104) in Japan. There is no
workaround.
•
CSCdt82308
Symptoms A router may restart by bus error in outputq_dequeue_eval.
Conditions This symptom occurs on a Cisco 2500 series router that is running Cisco IOS
Release 12.1(7).
Workaround There is no workaround.
•
CSCdt88551
When an IP digital subscriber line (DSL) switch is used as a Layer 2 Tunneling Protocol (L2TP)
network server (LNS), the IP DSL switch may pause indefinitely or reboot if the ping sweep (from
64 to 1500) is generated from the customer premises equipment (CPE). There is no workaround.
•
CSCdu01392
Symptoms A Cisco router may reload with a bus error that points to a “poisoned” address of
0xD0D0D29.
Conditions This condition is seen on a Cisco 3620 router that is running Cisco IOS Release 12.1(7).
Workaround There is no workaround.
Caveats for Cisco IOS Release 12.2
676
OL-3513-16 Rev. G0
Resolved Caveats—Cisco IOS Release 12.2(5)
•
CSCdu06849
The clear interface Serial0:23 EXEC command does not clear modem calls.
Workaround: Clear the modem calls by entering the clear line line number privileged EXEC
command.
•
CSCdu15752
Symptoms Spurious memory accesses may occur when locally generated voice packets are fast
switched to Multilink bundles.
Conditions These symptoms are observed on particle-based platforms, such as the Cisco 2600,
3600, and 7200 series of routers,
Workaround There is no workaround.
•
CSCdu16158
After the introduction of CSCds32293 (integrated into Cisco IOS Release 12.1(5.3)T and 12.1(5.1)),
virtual profiles identify interesting traffic using the dialer group inherited from the physical interface
or legacy dialer interface. If no dialer group is defined on the physical or legacy dialer interface, no
traffic is deemed interesting and the connection is dropped after the idle timeout (also inherited from
the physical or dialer interface).
Workaround: Add the dialer group to the parent interface so that interesting traffic is defined. This
workaround will not work if dialer and virtual profiles are used on the same physical interface
because the dialer-group interface configuration command and the dialer pool-member interface
configuration command are mutually exclusive. If your setup involves the same dialer and virtual
profiles on the same interface, use the alternate workaround instead.
Alternate Workaround: Add a ppp-timeout retry seconds interface configuration command to the
cloned virtual template for the virtual profile because the PPP timeout supersedes the default idle
timeout.
•
CSCdu25422
A Cisco 2620 router running Cisco IOS Release 12.1(05)T07 with a Basic Rate Interface (BRI) to
the public switched telephone network (PSTN) as a gateway for the Cisco Call Manager may
experience disconnecting calls when using the European Telecommunications Standards Institute
(ETSI) Supplementary Service. There is no workaround.
•
CSCdu32204
On a Cisco AS5800 access server that is running Cisco IOS Release 12.1(5)T8, PPP callback may
not work for multilink calls. When PPP callback is done and AAA provides the callback dial string
and then PPP multilink is used, callback is performed only for the first link in the multilink bundle.
Additional links do not trigger callback. There is no workaround.
•
CSCdu33245
A Cisco router may reload when the shut command followed by the no shut command is entered on
the controller. There is no workaround.
•
CSCdu34184
A Cisco router that is running Cisco IOS Release 12.2 with Frame Relay traffic shaping (FRTS) may
reload when FRTS is deconfigured and reconfigured, and with increased traffic going through the
permanent virtual circuit (PVC) that enables FRTS.
Workaround: Either shut down the interface after deconfiguring FRTS or wait approximately 5 to 10
minutes before reconfiguring FRTS.
Caveats for Cisco IOS Release 12.2
OL-3513-16 Rev. G0
677
Resolved Caveats—Cisco IOS Release 12.2(5):
•
CSCdu34195
When dialer maps are used, entering the show caller full, the show dialer interface, and the show
source ip EXEC commands will show the IP address that brought the line up. However, when dialer
aaa is used, these commands will show only a generic hexadecimal number representing the dialer
session rather than the source IP address that brought up the session. This condition makes it
impossible to identify the source station that brought up the dialer session. There is no workaround.
•
CSCdu37471
Symptoms A Resource Availability Indication (RAI) may fail to be sent.
Conditions This symptom occurs when the signaling channel on a Cisco SC2200 signaling
controller is disabled.
Workaround There is no workaround.
•
CSCdu38878
When an interface is cleared, the Service Profile Identifier (SPID) is reported on the BRI network
module or WAN interface card as invalid. The SPID that is reported after the interface is cleared is
still invalid. There is no workaround.
•
CSCdu42219
Incoming calls may fail to connect and may be released. The system does not put B-channels on the
first E1/T1 in service. Incoming calls are failing with channel unavailable. If the channels are
“busyout” and “unbusy,” the service is disabled and reenabled and calls can be properly accepted.
There is no workaround.
•
CSCdu45569
A Cisco 7513 router experienced a dialup failure using pri-group on a Multi-Channel E3 Port
Adapter (PA-MC-E3) after a software upgrade of Cisco IOS Release 11.1(30)CC to 12.0(16)S1,
following which all dial-ins and dial-outs failed with error messages at call-setup. There were no
changes to the configuration. There is no workaround.
•
CSCdu50419
A Cisco router that is connected to a vendor-specific switch may experience no ringback with
outside calls. After the CALL PROCEEDING message is received, a PROGRESS message such as
an ALERTING message is received. There is no workaround.
•
CSCdu51248
In systems which use Multilink PPP’s bandwidth-on-demand features, multilink will not attempt to
connect additional channels to bundles in response to heavy traffic loads.
Workaround: Enter the debug ppp multilink events EXEC command to cause Multilink to request
additional channels.
•
CSCdu51346
Symptoms May return to ROM with a bus error in Compression Control Protocol (CCP) processes.
Conditions This symptom is observed on a Cisco AS5400 universal gateway.
Workaround Disable compression.
•
CSCdu51548
Symptoms A Cisco 3620 router may reload in the “ipcp_add_ip_route” routine when performing
asynchronous functionality (terminal server) tests.
Conditions In this situation, the lines have been cleared for dial-on-demand routing (DDR), and the
reload occurs while pings are being sent to Cisco 2600 series router through a modem.
Caveats for Cisco IOS Release 12.2
678
OL-3513-16 Rev. G0
Resolved Caveats—Cisco IOS Release 12.2(5)
Workaround There is no workaround.
•
CSCdu59931
Voice calls may be dropped when dial traps are enabled.
Workaround: Disable the dial traps.
•
CSCdu60028
Symptoms When a router is short of memory, it may reload in cca_complete_setup.
Conditions :This symptom may be observed on any Cisco router that is running Cisco IOS
Release 12.1, 12.2, or 12.2 T, but only when another problem has caused a shortage of memory.
Workaround There is no workaround.
•
CSCdu60798
Symptoms A Cisco AS5300 universal access server may reload.
Conditions This symptom is observed on a Cisco AS5300 universal access server that is running
Cisco IOS Release 12.1(5)T8 when Layer 2 Tunneling Protocol (L2TP) is enabled. The occurrence
of this condition can be minimized by reducing the response time of the Authentication,
Authorization, and Accounting (AAA) server.
Workaround There is no workaround.
•
CSCdu62721
Incoming calls may fail to connect and may be released. The system does not put B channels on the
first E1/T1 in service. Incoming calls are failing with channel unavailable. If the channels are
“busyout” and “unbusy” the service is restored and calls can be properly accepted. This is observed
on Cisco 5300 and 5800 universal access servers. There is no workaround.
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CSCdu68575
Symptoms A Cisco 7500 series router may, upon reboot, have the VIP2-40 unexpectedly reload with
an arithmetic exception or sig-5 error.
Conditions This symptom was observed on a Cisco 7500 series router that is upgrading from
Cisco IOS Release 12.0(12) to Cisco IOS Release 12.1(8.1b). This problem occurred on two
separate routers. Both routers were Cisco 7513 routers with RSP4s and VIP2-40 with 8-port serial
cards.
Workaround There is no workaround.
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CSCdu72708
Symptoms The ip address negotiated interface configuration command must be applied to the
configuration of an interface before any other PPP commands.
Conditions This symptom is observed when the on-demand address pool (ODAP) on-board
Dynamic Host Configuration Protocol (DHCP) server is used.
Workaround There is no workaround.
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CSCdu87877
A Cisco AS5400 access server that is running Cisco IOS Release 12.2 may experience a reload
during controller shut when the Non-Facility Associated Signaling (NFAS) backup D channel is
configured before the primary D channel. There is no workaround.
Caveats for Cisco IOS Release 12.2
OL-3513-16 Rev. G0
679
Resolved Caveats—Cisco IOS Release 12.2(5):
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CSCdu88095
On a Cisco AS5400 access server gateway in the Cisco SS7 Interconnect for Voice Gateways
solution that is running Cisco IOS Releases 12.2(2)T, 12.1(5)XM, or 12.2(2)XA, the associated B
channels do not come into service after configuring the Non-Facility Associated Signaling (NFAS)
under the T1 controllers. If all the NFAS members are removed and then reconfigured and the isdn
rlm-group command is applied, the B channels do not come into service.
Workaround: There are two ways to workaround this problem before removing the NFAS members
and adding them back in.
1. Shutdown the D channel (rlm or int ser6/0:23); remove the pri-group; configure pri-group; and
configure isdn rlm-group 0.
2. Enter the no isdn rlm-group 0 command first, and then remove all the NFAS members; configure
nfas again, and then enter the configure rlm-group command.
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CSCdv01870
A router may reload when a permanent virtual connection (PVC) is removed while a large amount
of traffic is going through a PVC that has the frame-relay adaptive-shaping interface-congestion
map-class configuration command configured. There is no workaround.
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CSCdv03689
If a Point to Point Protocol (PPP) Multilink bundle interface goes down while data is flowing
through it, a Cisco router may reload. There is no workaround.
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CSCdv16842
Symptoms A router may reload when it is performing heavy IP Control Protocol (IPCP) address
negotiations such as those that occur when an ATM or Frame Relay interface with several hundred
links are brought up simultaneously.
Conditions This symptom is only seen when several hundred IPCP sessions are renegotiated without
a recycle of Link Control Protocol (LCP).
Workaround There is no workaround.
Caveats for Cisco IOS Release 12.2
680
OL-3513-16 Rev. G0